diff --git a/bundles/org.openhab.core.automation.rest/src/main/java/org/openhab/core/automation/rest/internal/ThingActionsResource.java b/bundles/org.openhab.core.automation.rest/src/main/java/org/openhab/core/automation/rest/internal/ThingActionsResource.java
index 40c25278bc3..c7c4b009acf 100644
--- a/bundles/org.openhab.core.automation.rest/src/main/java/org/openhab/core/automation/rest/internal/ThingActionsResource.java
+++ b/bundles/org.openhab.core.automation.rest/src/main/java/org/openhab/core/automation/rest/internal/ThingActionsResource.java
@@ -217,7 +217,9 @@ public Response getActions(@PathParam("thingUID") @Parameter(description = "thin
 
     @POST
     @RolesAllowed({ Role.USER, Role.ADMIN })
-    @Path("/{thingUID}/{actionUid: [a-zA-Z0-9]+\\.[a-zA-Z0-9]+}")
+    // accept actionUid in the form of "scope.actionTypeUid" or "scope.actionTypeUid#signatureHash"
+    // # is URL encoded as %23
+    @Path("/{thingUID}/{actionUid: [a-zA-Z0-9]+\\.[a-zA-Z0-9]+(%23[A-Fa-f0-9]+)?}")
     @Consumes(MediaType.APPLICATION_JSON)
     @Produces(MediaType.APPLICATION_JSON)
     @Operation(operationId = "executeThingAction", summary = "Executes a thing action.", responses = {