diff --git a/.github/workflows/codeql.yml b/.github/workflows/codeql.yml
index 28b94633b..1528138a7 100644
--- a/.github/workflows/codeql.yml
+++ b/.github/workflows/codeql.yml
@@ -130,7 +130,7 @@ jobs:
         with:
           # The companion workflow parses this artifact as untrusted data only.
           name: codeql-pr-results-${{ matrix.language }}
-          path: results/${{ matrix.language }}.sarif
+          path: results/*.sarif
           if-no-files-found: error
           retention-days: 1
 
diff --git a/src/control-plane-services/cloud-functions/nvcf-core/src/main/java/com/nvidia/nvcf/rest/function/management/dto/PriorityDto.java b/src/control-plane-services/cloud-functions/nvcf-core/src/main/java/com/nvidia/nvcf/rest/function/management/dto/PriorityDto.java
index 0496c7ba7..d3cfbab87 100644
--- a/src/control-plane-services/cloud-functions/nvcf-core/src/main/java/com/nvidia/nvcf/rest/function/management/dto/PriorityDto.java
+++ b/src/control-plane-services/cloud-functions/nvcf-core/src/main/java/com/nvidia/nvcf/rest/function/management/dto/PriorityDto.java
@@ -31,6 +31,12 @@
 import java.lang.annotation.Target;
 import java.util.Map;
 import org.springframework.util.CollectionUtils;
+import tools.jackson.core.JsonParser;
+import tools.jackson.core.JsonToken;
+import tools.jackson.databind.DeserializationContext;
+import tools.jackson.databind.annotation.JsonDeserialize;
+import tools.jackson.databind.deser.std.StdScalarDeserializer;
+import tools.jackson.databind.type.LogicalType;
 
 @PriorityDto.ValidPriority
 @Schema(types = {"object"},
@@ -40,6 +46,7 @@ public record PriorityDto(
         @Min(value = 0, message = "defaultPriority must be >= 0")
         @Max(value = MAX_PRIORITY, message = "defaultPriority must be <= " + MAX_PRIORITY)
         @Schema(description = "Default priority.")
+        @JsonDeserialize(using = PriorityValueDeserializer.class)
         Long defaultPriority,
 
         @Nullable
@@ -47,6 +54,7 @@ public record PriorityDto(
                 message = "Maximum number of perAccountPriority entries of " + MAX_PER_ACCOUNT_ENTRIES
                         + " is exceeded.")
         @Schema(description = "Per-account priority overrides, keyed by account ID.")
+        @JsonDeserialize(contentUsing = PriorityValueDeserializer.class)
         Map<String,
                 @Min(value = 0, message = "priority must be >= 0")
                 @Max(value = MAX_PRIORITY, message = "priority must be <= " + MAX_PRIORITY)
@@ -57,6 +65,8 @@ public record PriorityDto(
     static final int MAX_PER_ACCOUNT_ENTRIES = 64;
     private static final String MESG_DEFAULT_REQUIRED_WITH_OVERRIDES =
             "Invalid priority: 'defaultPriority' is required when 'perAccountPriority' has entries";
+    private static final String MESG_PRIORITY_MUST_BE_INTEGER =
+            "priority must be an integer";
 
     @Constraint(validatedBy = ValidPriorityValidator.class)
     @Target(ElementType.TYPE)
@@ -88,4 +98,24 @@ public boolean isValid(PriorityDto value, ConstraintValidatorContext context) {
             return true;
         }
     }
+
+    /** Deserializes priority values while rejecting floating-point JSON numbers. */
+    public static class PriorityValueDeserializer extends StdScalarDeserializer<Long> {
+        public PriorityValueDeserializer() {
+            super(Long.class);
+        }
+
+        @Override
+        public LogicalType logicalType() {
+            return LogicalType.Integer;
+        }
+
+        @Override
+        public Long deserialize(JsonParser parser, DeserializationContext context) {
+            if (parser.hasToken(JsonToken.VALUE_NUMBER_FLOAT)) {
+                return context.reportInputMismatch(Long.class, MESG_PRIORITY_MUST_BE_INTEGER);
+            }
+            return _parseLong(parser, context, Long.class);
+        }
+    }
 }
diff --git a/src/control-plane-services/cloud-functions/nvcf-core/src/test/java/com/nvidia/nvcf/rest/function/management/FunctionWithLlmInvocationConfigPriorityTest.java b/src/control-plane-services/cloud-functions/nvcf-core/src/test/java/com/nvidia/nvcf/rest/function/management/FunctionWithLlmInvocationConfigPriorityTest.java
index 113cbdd08..dd38d2aa8 100644
--- a/src/control-plane-services/cloud-functions/nvcf-core/src/test/java/com/nvidia/nvcf/rest/function/management/FunctionWithLlmInvocationConfigPriorityTest.java
+++ b/src/control-plane-services/cloud-functions/nvcf-core/src/test/java/com/nvidia/nvcf/rest/function/management/FunctionWithLlmInvocationConfigPriorityTest.java
@@ -386,6 +386,85 @@ void createWithDefaultPriorityAboveMaxIsRejected() {
         assertThat(response.getBody()).contains("defaultPriority");
     }
 
+    @Test
+    void updateWithFractionalDefaultPriorityIsRejectedWithoutChangingPriority() {
+        var created = createLlmFunction(uniqueName("fractional-default"), priorityConfig(7L, null));
+        var updateToken = MOCK_OAUTH2_TOKEN_SERVER.getJwt(TEST_CLIENT_SUBJECT,
+                                                          List.of(SCOPE_UPDATE_FUNCTION), 100);
+        var updateEntity = RequestEntity.put(URI.create("/v2/nvcf/functions/" + created.id()
+                                                        + "/versions/" + created.versionId()))
+                .contentType(MediaType.APPLICATION_JSON)
+                .header("Authorization", "Bearer " + updateToken)
+                .body("""
+                        {
+                          "llmInvocationConfig": {
+                            "priority": {
+                              "defaultPriority": 1.5
+                            }
+                          }
+                        }
+                        """);
+
+        var updateResponse = testRestTemplate.exchange(updateEntity, String.class);
+
+        assertThat(updateResponse.getStatusCode()).isEqualTo(HttpStatus.BAD_REQUEST);
+
+        var getToken = MOCK_OAUTH2_TOKEN_SERVER.getJwt(TEST_CLIENT_SUBJECT,
+                                                       List.of(SCOPE_LIST_FUNCTIONS), 100);
+        var getEntity = RequestEntity.get(URI.create("/v2/nvcf/functions/" + created.id()
+                                                     + "/versions/" + created.versionId()))
+                .header("Authorization", "Bearer " + getToken)
+                .build();
+        var getResponse = testRestTemplate.exchange(getEntity, FunctionResponse.class);
+
+        assertThat(getResponse.getStatusCode()).isEqualTo(HttpStatus.OK);
+        assertThat(getResponse.getBody()).isNotNull();
+        assertThat(getResponse.getBody().function().llmInvocationConfig().priority().defaultPriority())
+                .isEqualTo(7L);
+    }
+
+    @Test
+    void updateWithFractionalPerAccountPriorityIsRejectedWithoutChangingPriority() {
+        var created = createLlmFunction(
+                uniqueName("fractional-per-account"),
+                priorityConfig(7L, Map.of(OVERRIDE_NCA_ID, 3L)));
+        var updateToken = MOCK_OAUTH2_TOKEN_SERVER.getJwt(TEST_CLIENT_SUBJECT,
+                                                          List.of(SCOPE_UPDATE_FUNCTION), 100);
+        var updateEntity = RequestEntity.put(URI.create("/v2/nvcf/functions/" + created.id()
+                                                        + "/versions/" + created.versionId()))
+                .contentType(MediaType.APPLICATION_JSON)
+                .header("Authorization", "Bearer " + updateToken)
+                .body("""
+                        {
+                          "llmInvocationConfig": {
+                            "priority": {
+                              "defaultPriority": 7,
+                              "perAccountPriority": {
+                                "nca-override": 1.5
+                              }
+                            }
+                          }
+                        }
+                        """);
+
+        var updateResponse = testRestTemplate.exchange(updateEntity, String.class);
+
+        assertThat(updateResponse.getStatusCode()).isEqualTo(HttpStatus.BAD_REQUEST);
+
+        var getToken = MOCK_OAUTH2_TOKEN_SERVER.getJwt(TEST_CLIENT_SUBJECT,
+                                                       List.of(SCOPE_LIST_FUNCTIONS), 100);
+        var getEntity = RequestEntity.get(URI.create("/v2/nvcf/functions/" + created.id()
+                                                     + "/versions/" + created.versionId()))
+                .header("Authorization", "Bearer " + getToken)
+                .build();
+        var getResponse = testRestTemplate.exchange(getEntity, FunctionResponse.class);
+
+        assertThat(getResponse.getStatusCode()).isEqualTo(HttpStatus.OK);
+        assertThat(getResponse.getBody()).isNotNull();
+        assertThat(getResponse.getBody().function().llmInvocationConfig().priority())
+                .isEqualTo(new PriorityDto(7L, Map.of(OVERRIDE_NCA_ID, 3L)));
+    }
+
     @Test
     void updateWithModelUpdatesAndLlmInvocationConfigAppliesBothToAllVersions() {
         var name = uniqueName("update-both");