diff --git a/cve_bin_tool/parsers/__init__.py b/cve_bin_tool/parsers/__init__.py
index 843b210fb1..88cb7332d5 100644
--- a/cve_bin_tool/parsers/__init__.py
+++ b/cve_bin_tool/parsers/__init__.py
@@ -85,7 +85,7 @@ def find_vendor(self, product, version):
             )
         return vendorlist
 
-    def generate_purl(self, product, vendor, qualifier={}, subpath=None):
+    def generate_purl(self, product, vendor="", qualifier={}, subpath=None):
         """Generate purl string based on various components."""
         purl = PackageURL(
             type=self.purl_pkg_type,
@@ -104,36 +104,48 @@ def find_vendor_from_purl(self, purl, ver) -> Tuple[List[ScanInfo], bool]:
         It then decodes the CPE data to extract vendor, product, and version information. If the version matches the provided
         version, it constructs a ScanInfo object for each matching entry and returns a list of these objects.
         """
-
-        query = "SELECT cpe from purl2cpe WHERE purl=?"
-        cursor = self.db_open_and_get_cursor()
-        cursor.execute(query, [str(purl)])
-        cpeList = cursor.fetchall()
-        vendorlist: list[ScanInfo] = []
-        vendors = set()
-
-        if cpeList != []:
-            for item in cpeList:
-                vendor, product, version = self.decode_cpe23(str(item))
-                vendors.add((vendor, product))
-        else:
-            return vendorlist, False
-        purl_with_ver = f"{str(purl)}@{ver}"
-        for vendor, product in vendors:
-            vendorlist.append(
-                ScanInfo(
-                    ProductInfo(
-                        vendor,
-                        product,
-                        ver,
-                        "/usr/local/bin/product",
-                        purl=purl_with_ver,
-                    ),
-                    self.filename,
+        try:
+            purl = purl.to_dict()
+            param1 = f"pkg:{purl['type']}/{purl['name']}"
+            param2 = f"pkg:{purl['type']}/%/{purl['name']}"
+
+            query = """
+                SELECT cpe from purl2cpe WHERE purl LIKE ?
+                UNION
+                SELECT cpe from purl2cpe WHERE purl LIKE ?
+            """
+            cursor = self.db_open_and_get_cursor()
+            cursor.execute(query, (param1, param2))
+            cpeList = cursor.fetchall()
+            vendorlist: list[ScanInfo] = []
+            vendors = set()
+
+            if cpeList != []:
+                for item in cpeList:
+                    vendor, _, _ = self.decode_cpe23(str(item))
+                    vendors.add((vendor, purl["name"]))
+            else:
+                return vendorlist, False
+
+            purl_with_ver = f"{str(purl)}@{ver}"
+            for vendor, product in vendors:
+                vendorlist.append(
+                    ScanInfo(
+                        ProductInfo(
+                            vendor,
+                            product,
+                            ver,
+                            "/usr/local/bin/product",
+                            purl_with_ver,
+                        ),
+                        self.filename,
+                    )
                 )
-            )
 
-        return vendorlist, True
+            return vendorlist, True
+        except Exception as e:
+            self.logger.error(f"Error occurred: {e}")
+            return [], False
 
     def db_open_and_get_cursor(self) -> sqlite3.Cursor:
         """Opens connection to sqlite database, returns cursor object."""
diff --git a/cve_bin_tool/parsers/dart.py b/cve_bin_tool/parsers/dart.py
index b84847395a..41e7b0b077 100644
--- a/cve_bin_tool/parsers/dart.py
+++ b/cve_bin_tool/parsers/dart.py
@@ -19,15 +19,14 @@ def __init__(self, cve_db, logger):
         super().__init__(cve_db, logger)
         self.purl_pkg_type = "pub"
 
-    def generate_purl(self, product, vendor, qualifier={}, subpath=None):
+    def generate_purl(self, product, vendor="", qualifier={}, subpath=None):
         """
         Generates PURL after normalizing all components.
         pubspec: https://dart.dev/tools/pub/pubspec#name
         purl-spec for pub: https://github.com/package-url/purl-spec/blob/master/PURL-TYPES.rst#pub
         """
-        # Normalize product and vendor for Dart packages
+        # Normalize product for Dart packages
         product = re.sub(r"[^a-zA-Z0-9_]", "", product).lower()
-        vendor = "UNKNOWN"  # The vendor is not explicitly defined for pub packages
         if not product:
             return None
 
@@ -50,7 +49,10 @@ def run_checker(self, filename):
             for package_name, package_detail in data.get("packages", {}).items():
                 product = package_name
                 version = package_detail.get("version").replace('"', "")
-                vendor = self.find_vendor(product, version)
+                purl = self.generate_purl(product)
+                vendor, result = self.find_vendor_from_purl(purl, version)
+                if not result:
+                    vendor = self.find_vendor(product, version)
                 if vendor:
                     yield from vendor
         self.logger.debug(f"Done scanning file: {self.filename}")
diff --git a/cve_bin_tool/parsers/go.py b/cve_bin_tool/parsers/go.py
index d94751a725..6dbf3d4542 100644
--- a/cve_bin_tool/parsers/go.py
+++ b/cve_bin_tool/parsers/go.py
@@ -29,16 +29,13 @@ def __init__(self, cve_db, logger):
         super().__init__(cve_db, logger)
         self.purl_pkg_type = "golang"
 
-    def generate_purl(self, product, vendor, qualifier={}, subpath=None):
+    def generate_purl(self, product, vendor="", qualifier={}, subpath=None):
         """Generates PURL after normalizing all components."""
 
         product = re.sub(r"[^a-zA-Z0-9_-]", "", product)
-        vendor = re.sub(r"^[^a-zA-Z_]|[^a-zA-Z0-9_-]", "", vendor)
 
         if not re.match(r"^[a-zA-Z0-9_-]", product):
             return
-        if vendor == "":
-            vendor = "UNKNOWN"
 
         purl = super().generate_purl(
             product,
@@ -73,7 +70,11 @@ def run_checker(self, filename):
                     if len(parts) >= 2:
                         product = line.split(" ")[0].split("/")[-1]
                         version = line.split(" ")[1][1:].split("-")[0].split("+")[0]
-                        vendors = self.find_vendor(product, version)
+                        purl = self.generate_purl(product)
+                        vendors, result = self.find_vendor_from_purl(purl, version)
+
+                        if not result:
+                            vendors = self.find_vendor(product, version)
                         if vendors is not None:
                             yield from vendors
             self.logger.debug(f"Done scanning file: {self.filename}")
diff --git a/cve_bin_tool/parsers/java.py b/cve_bin_tool/parsers/java.py
index 9677c49b3c..81ab59ea15 100644
--- a/cve_bin_tool/parsers/java.py
+++ b/cve_bin_tool/parsers/java.py
@@ -1,3 +1,4 @@
+# NOTE: DONE
 # Copyright (C) 2022 Intel Corporation
 # SPDX-License-Identifier: GPL-3.0-or-later
 """Script containing all functionalities relating to parsing of Java-based files."""
@@ -18,11 +19,10 @@ def __init__(self, cve_db, logger, validate=True):
         self.validate = validate
         self.purl_pkg_type = "maven"
 
-    def generate_purl(self, product, vendor, qualifier={}, subpath=None):
+    def generate_purl(self, product, vendor="", qualifier={}, subpath=None):
         """Generates PURL after normalizing all components of a Maven package."""
-        # Normalize product and vendor
+        # Normalize product
         product = re.sub(r"[^a-zA-Z0-9._-]", "", product).lower()
-        vendor = re.sub(r"[^a-zA-Z0-9._-]", "", vendor).lower() if vendor else "UNKNOWN"
 
         if not product:
             return None
@@ -97,7 +97,10 @@ def run_checker(self, filename):
             if product is None and parent is not None:
                 product = parent.find(schema + "artifactId").text
             if product is not None and version is not None:
-                product_info = self.find_vendor(product, version)
+                purl = self.generate_purl(product)
+                product_info, result = self.find_vendor_from_purl(purl, version)
+                if not result:
+                    product_info = self.find_vendor(product, version)
                 if product_info is not None:
                     yield from product_info
 
@@ -130,7 +133,14 @@ def run_checker(self, filename):
                             self.logger.debug(f"{file_path} {product.text} {version}")
                             if version[0].isdigit():
                                 # Valid version identifier
-                                product_info = self.find_vendor(product.text, version)
+                                purl = self.generate_purl(product.text)
+                                product_info, result = self.find_vendor_from_purl(
+                                    purl, version
+                                )
+                                if not result:
+                                    product_info = self.find_vendor(
+                                        product.text, version
+                                    )
                                 if product_info is not None:
                                     yield from product_info
         self.logger.debug(f"Done scanning file: {filename}")
diff --git a/cve_bin_tool/parsers/javascript.py b/cve_bin_tool/parsers/javascript.py
index 023eddc8d3..6f58230315 100644
--- a/cve_bin_tool/parsers/javascript.py
+++ b/cve_bin_tool/parsers/javascript.py
@@ -15,10 +15,9 @@ def __init__(self, cve_db, logger):
         super().__init__(cve_db, logger)
         self.purl_pkg_type = "npm"
 
-    def generate_purl(self, product, vendor, qualifier={}, subpath=None):
+    def generate_purl(self, product, vendor="", qualifier={}, subpath=None):
         """Generates PURL after normalizing all components."""
         product = re.sub(r"[^a-zA-Z0-9._-]", "", product).lower()
-        vendor = "UNKNOWN"  # Typically, the vendor is not explicitly defined for npm packages
 
         if not product:
             return None
@@ -44,7 +43,11 @@ def run_checker(self, filename):
             if "name" in data and "version" in data:
                 product = data["name"]
                 version = data["version"]
-                vendor = self.find_vendor(product, version)
+                purl = self.generate_purl(product)
+                vendor, result = self.find_vendor_from_purl(purl, version)
+
+                if not result:
+                    vendor = self.find_vendor(product, version)
             else:
                 vendor = None
             if vendor is not None:
@@ -93,7 +96,11 @@ def run_checker(self, filename):
                             product_version_mapping.append((product, version))
 
             for product, version in product_version_mapping:
-                vendor = self.find_vendor(product, version)
+                purl = self.generate_purl(product, "")
+                vendor, result = self.find_vendor_from_purl(purl, version)
+
+                if not result:
+                    vendor = self.find_vendor(product, version)
                 if vendor is not None:
                     yield from vendor
             self.logger.debug(f"Done scanning file: {self.filename}")
diff --git a/cve_bin_tool/parsers/perl.py b/cve_bin_tool/parsers/perl.py
index 90d6160cf8..566e0fcdc9 100644
--- a/cve_bin_tool/parsers/perl.py
+++ b/cve_bin_tool/parsers/perl.py
@@ -13,11 +13,10 @@ def __init__(self, cve_db, logger):
         super().__init__(cve_db, logger)
         self.purl_pkg_type = "cpan"
 
-    def generate_purl(self, product, vendor, qualifier={}, subpath=None):
+    def generate_purl(self, product, vendor="", qualifier={}, subpath=None):
         """Generates PURL after normalizing all components."""
         # Normalize product and vendor for Perl packages
         product = re.sub(r"[^a-zA-Z0-9._-]", "", product).lower()
-        vendor = "UNKNOWN"  # Typically, the vendor is not explicitly defined for CPAN packages
 
         if not product:
             return None
@@ -53,7 +52,13 @@ def run_checker(self, filename):
 
             # Print the extracted dependencies
             for dependency in dependencies:
-                vendor = self.find_vendor(dependency[0], dependency[1])
+                product = dependency[0]
+                version = dependency[1]
+                purl = self.generate_purl(product)
+                vendor, result = self.find_vendor_from_purl(purl, version)
+
+                if not result:
+                    vendor = self.find_vendor(product, version)
                 if vendor is not None:
                     yield from vendor
         self.logger.debug(f"Done scanning file: {self.filename}")
diff --git a/cve_bin_tool/parsers/php.py b/cve_bin_tool/parsers/php.py
index a486d4e5ce..c39f8ff644 100644
--- a/cve_bin_tool/parsers/php.py
+++ b/cve_bin_tool/parsers/php.py
@@ -1,3 +1,6 @@
+# NOTE: remains not complete
+
+
 # Copyright (C) 2024 Intel Corporation
 # SPDX-License-Identifier: GPL-3.0-or-later
 """Python script containing all functionalities related to parsing of php's composer.lock files."""
@@ -19,12 +22,11 @@ def __init__(self, cve_db, logger):
         super().__init__(cve_db, logger)
         self.purl_pkg_type = "composer"
 
-    def generate_purl(self, product, vendor, qualifier={}, subpath=None):
+    def generate_purl(self, product, vendor="", qualifier={}, subpath=None):
         """Generates PURL after normalizing all components."""
-        vendor = re.sub(r"[^a-zA-Z0-9._-]", "", vendor).lower()
         product = re.sub(r"[^a-zA-Z0-9._-]", "", product).lower()
 
-        if not vendor or not product:
+        if not product:
             return None
 
         purl = super().generate_purl(
@@ -51,7 +53,11 @@ def run_checker(self, filename):
                         version = version[1:]
                     if "dev" in version:
                         continue
-                    vendor = self.find_vendor(product, version)
+                    purl = self.generate_purl(product)
+                    vendor, result = self.find_vendor_from_purl(purl, version)
+
+                    if not result:
+                        vendor = self.find_vendor(product, version)
                     if vendor is not None:
                         yield from vendor
             self.logger.debug(f"Done scanning file: {self.filename}")
diff --git a/cve_bin_tool/parsers/python.py b/cve_bin_tool/parsers/python.py
index 534cb55285..a403389bc7 100644
--- a/cve_bin_tool/parsers/python.py
+++ b/cve_bin_tool/parsers/python.py
@@ -25,7 +25,7 @@ def __init__(self, cve_db, logger):
         super().__init__(cve_db, logger)
         self.purl_pkg_type = "pypi"
 
-    def generate_purl(self, product, vendor, qualifier={}, subpath=None):
+    def generate_purl(self, product, vendor="", qualifier={}, subpath=None):
         """Generates PURL after normalizing all components."""
         product = re.sub(r"[^a-zA-Z0-9._-]", "", product).lower()
 
@@ -96,7 +96,7 @@ def run_checker(self, filename):
             for line in lines["install"]:
                 product = line["metadata"]["name"]
                 version = line["metadata"]["version"]
-                purl = self.generate_purl(product, "")
+                purl = self.generate_purl(product)
                 vendor, result = self.find_vendor_from_purl(purl, version)
 
                 if not result:
@@ -119,7 +119,7 @@ def __init__(self, cve_db, logger):
         super().__init__(cve_db, logger)
         self.purl_pkg_type = "pypi"
 
-    def generate_purl(self, product, vendor, qualifier={}, subpath=None):
+    def generate_purl(self, product, vendor="", qualifier={}, subpath=None):
         """Generates PURL after normalizing all components."""
         product = re.sub(r"[^a-zA-Z0-9._-]", "", product).lower()
 
@@ -147,7 +147,7 @@ def run_checker(self, filename):
         try:
             product = search(compile(r"^Name: (.+)$", MULTILINE), lines).group(1)
             version = search(compile(r"^Version: (.+)$", MULTILINE), lines).group(1)
-            purl = self.generate_purl(product, "")
+            purl = self.generate_purl(product)
             vendor, result = self.find_vendor_from_purl(purl, version)
 
             if vendor is not None:
diff --git a/cve_bin_tool/parsers/r.py b/cve_bin_tool/parsers/r.py
index cbaac0d548..a3e5da6d9a 100644
--- a/cve_bin_tool/parsers/r.py
+++ b/cve_bin_tool/parsers/r.py
@@ -30,11 +30,10 @@ def __init__(self, cve_db, logger):
         super().__init__(cve_db, logger)
         self.purl_pkg_type = "cran"
 
-    def generate_purl(self, product, vendor, qualifier={}, subpath=None):
+    def generate_purl(self, product, vendor="", qualifier={}, subpath=None):
         """Generates PURL after normalizing all components."""
 
         product = re.sub(r"[^a-zA-Z0-9.-]", "", product)
-        vendor = "UNKNOWN"
 
         if not re.match(r"^[a-zA-Z0-9_-]", product):
             return
@@ -57,7 +56,12 @@ def run_checker(self, filename):
             for package in content["Packages"]:
                 product = content["Packages"][package]["Package"]
                 version = content["Packages"][package]["Version"]
-                vendor = self.find_vendor(product, version)
+                purl = self.generate_purl(product)
+                vendor, result = self.find_vendor_from_purl(purl, version)
+
+                if not result:
+                    vendor = self.find_vendor(product, version)
+
                 if vendor is not None:
                     yield from vendor
             self.logger.debug(f"Done scanning file: {self.filename}")
diff --git a/cve_bin_tool/parsers/ruby.py b/cve_bin_tool/parsers/ruby.py
index b59b53dd2c..e904b9a638 100644
--- a/cve_bin_tool/parsers/ruby.py
+++ b/cve_bin_tool/parsers/ruby.py
@@ -1,4 +1,6 @@
-# Copyright (C) 2022 Intel Corporation
+# Copyright (C) 2024 Intel Corporation
+
+
 # SPDX-License-Identifier: GPL-3.0-or-later
 
 import re
@@ -29,16 +31,13 @@ def __init__(self, cve_db, logger):
         super().__init__(cve_db, logger)
         self.purl_pkg_type = "gem"
 
-    def generate_purl(self, product, vendor, qualifier={}, subpath=None):
+    def generate_purl(self, product, vendor="", qualifier={}, subpath=None):
         """Generates PURL after normalizing all components."""
 
         product = re.sub(r"^[^a-z]|[^a-z0-9_-]", "", product)
-        vendor = re.sub(r"^[^a-z]|[^a-z0-9_-]", "", vendor)
 
         if not re.match(r"^[a-z]|[a-z0-9_-]", product):
             return
-        if vendor == "":
-            vendor = "UNKNOWN"
 
         purl = super().generate_purl(
             product,
@@ -69,7 +68,11 @@ def run_checker(self, filename):
                 ):
                     product = line.strip().split()[0]
                     version = line.strip().split("(")[1][:-1]
-                    vendors = self.find_vendor(product, version)
+                    purl = self.generate_purl(product)
+                    vendors, result = self.find_vendor_from_purl(purl, version)
+
+                    if not result:
+                        vendors = self.find_vendor(product, version)
                     if vendors is not None:
                         yield from vendors
             self.logger.debug(f"Done scanning file: {self.filename}")
diff --git a/cve_bin_tool/parsers/rust.py b/cve_bin_tool/parsers/rust.py
index 46e1c00fd1..f7b7e25a97 100644
--- a/cve_bin_tool/parsers/rust.py
+++ b/cve_bin_tool/parsers/rust.py
@@ -28,16 +28,13 @@ def __init__(self, cve_db, logger):
         super().__init__(cve_db, logger)
         self.purl_pkg_type = "cargo"
 
-    def generate_purl(self, product, vendor, qualifier={}, subpath=None):
+    def generate_purl(self, product, vendor="", qualifier={}, subpath=None):
         """Generates PURL after normalizing all components."""
 
         product = re.sub(r"^[^a-zA-Z_]|[^a-zA-Z0-9_-]", "", product)
-        vendor = re.sub(r"^[^a-zA-Z_]|[^a-zA-Z0-9_-]", "", vendor)
 
         if not re.match(r"^[a-zA-Z_]|[a-zA-Z0-9_-]", product):
             return
-        if vendor == "":
-            vendor = "UNKNOWN"
 
         purl = super().generate_purl(
             product,
@@ -63,7 +60,13 @@ def run_checker(self, filename):
                 else:
                     if product == "" and version == "":
                         continue
-                    vendors = self.find_vendor(product, version)
+
+                    purl = self.generate_purl(product)
+                    vendors, result = self.find_vendor_from_purl(purl, version)
+
+                    if not result:
+                        vendors = self.find_vendor(product, version)
+
                     if vendors is not None:
                         yield from vendors
                     product = ""
diff --git a/cve_bin_tool/parsers/swift.py b/cve_bin_tool/parsers/swift.py
index 3e3b8e130f..c983826a4a 100644
--- a/cve_bin_tool/parsers/swift.py
+++ b/cve_bin_tool/parsers/swift.py
@@ -32,15 +32,13 @@ def __init__(self, cve_db, logger):
         super().__init__(cve_db, logger)
         self.purl_pkg_type = "swift"
 
-    def generate_purl(self, product, vendor, qualifier={}, subpath=None):
+    def generate_purl(self, product, vendor="", qualifier={}, subpath=None):
         """Generates PURL after normalizing all components."""
 
         product = re.sub(r"[^a-zA-Z0-9_-]", "", product)
 
         if not re.match(r"[a-zA-Z0-9_-]", product):
             return
-        if not vendor:
-            vendor = "UNKNOWN"
 
         purl = super().generate_purl(
             product,
@@ -71,7 +69,11 @@ def run_checker(self, filename):
                     domain = parse.netloc
                 self.logger.debug(domain)
 
-                vendors = self.find_vendor(product, version)
+                purl = self.generate_purl(product)
+                vendors, result = self.find_vendor_from_purl(purl, version)
+
+                if not result:
+                    vendors = self.find_vendor(product, version)
                 if vendors is not None:
                     yield from vendors
             self.logger.debug(f"Done scanning file: {self.filename}")
diff --git a/test/language_data/fail_pom.xml b/test/language_data/fail_pom.xml
index 42ff70065a..e6b7c4387f 100644
--- a/test/language_data/fail_pom.xml
+++ b/test/language_data/fail_pom.xml
@@ -22,7 +22,6 @@
     <junit.jupiter.version>5.8.2</junit.jupiter.version>
     <mockito.version>4.2.0</mockito.version>
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-    <slf4j.version>2.0.0-alpha5</slf4j.version>
   </properties>
 
   <dependencyManagement>
@@ -80,18 +79,6 @@
       <version>${mockito.version}</version>
       <scope>test</scope>
     </dependency>
-    <dependency>
-      <groupId>org.slf4j</groupId>
-      <artifactId>slf4j-api</artifactId>
-      <version>${slf4j.version}</version>
-      <scope>test</scope>
-    </dependency>
-    <dependency>
-      <groupId>org.slf4j</groupId>
-      <artifactId>slf4j-simple</artifactId>
-      <version>${slf4j.version}</version>
-      <scope>test</scope>
-    </dependency>
   </dependencies>
 
   <build>
diff --git a/test/test_language_scanner.py b/test/test_language_scanner.py
index d30dfb325e..b1ce977f48 100644
--- a/test/test_language_scanner.py
+++ b/test/test_language_scanner.py
@@ -169,7 +169,12 @@ def setup_class(cls):
 
     @pytest.mark.parametrize(
         "filename, product_list",
-        (((str(TEST_FILE_PATH / "pom.xml")), ["jmeter", "hamcrest"]),),
+        (
+            (
+                (str(TEST_FILE_PATH / "pom.xml")),
+                ["jmeter", "hamcrest", "slf4j-simple", "slf4j-api"],
+            ),
+        ),
     )
     def test_java_package(self, filename: str, product_list: set[str]) -> None:
         """Test against a valid pom.xml file for Java packages"""