diff --git a/superset/mcp_service/jwt_verifier.py b/superset/mcp_service/jwt_verifier.py
index 605a2577717b..ef460d6ffebd 100644
--- a/superset/mcp_service/jwt_verifier.py
+++ b/superset/mcp_service/jwt_verifier.py
@@ -35,12 +35,7 @@
 from typing import Any, cast
 
 import httpx
-from authlib.jose.errors import (
-    BadSignatureError,
-    DecodeError,
-    ExpiredTokenError,
-    JoseError,
-)
+from authlib.jose.errors import JoseError
 from fastmcp.server.auth.auth import AccessToken
 from fastmcp.server.auth.providers.jwt import JWTVerifier
 from mcp.server.auth.middleware.auth_context import AuthContextMiddleware
@@ -491,7 +486,7 @@ async def load_access_token(self, token: str) -> AccessToken | None:  # noqa: C9
             # Step 1: Decode header and check algorithm
             try:
                 header = self._decode_token_header(token)
-            except (ValueError, DecodeError) as e:
+            except ValueError as e:
                 reason = "Malformed token header"
                 _jwt_failure_reason.set(reason)
                 logger.debug("Malformed token header: %s", e)
@@ -566,18 +561,16 @@ async def load_access_token(self, token: str) -> AccessToken | None:  # noqa: C9
             # Step 3: Decode and verify signature
             try:
                 claims = self.jwt.decode(token, verification_key)
-            except BadSignatureError:
-                reason = "Signature verification failed"
-                _jwt_failure_reason.set(reason)
-                return None
-            except ExpiredTokenError:
-                reason = "Token has expired (detected during decode)"
-                _jwt_failure_reason.set(reason)
-                return None
             except JoseError as e:
-                reason = "Token decode failed"
+                error_code = getattr(e, "error", None)
+                if error_code == "bad_signature":
+                    reason = "Signature verification failed"
+                elif error_code == "expired_token":
+                    reason = "Token has expired (detected during decode)"
+                else:
+                    reason = "Token decode failed"
+                    logger.debug("Token decode failed: %s", e)
                 _jwt_failure_reason.set(reason)
-                logger.debug("Token decode failed: %s", e)
                 return None
 
             # Extract client ID for logging
diff --git a/superset/mcp_service/mcp_config.py b/superset/mcp_service/mcp_config.py
index 33a4e45c142b..150cd48a395b 100644
--- a/superset/mcp_service/mcp_config.py
+++ b/superset/mcp_service/mcp_config.py
@@ -20,7 +20,6 @@
 import secrets
 from typing import Any, Dict, Optional, Sequence
 
-from authlib.jose.errors import JoseError
 from fastmcp.server.auth.providers.jwt import JWTVerifier
 from flask import Flask
 
@@ -379,7 +378,7 @@ def create_default_mcp_auth_factory(app: Flask) -> Optional[Any]:
                     public_key=public_key,
                     secret=secret,
                 )
-            except (ValueError, JoseError):
+            except Exception:
                 # Do not log the exception — it may contain secrets (e.g., key material)
                 logger.error("Failed to create MCP JWT verifier")
                 if not api_key_enabled: