BerriAI/litellm · error · ValueError

An error occurred during token validation: {e}

Error message

An error occurred during token validation: {e}

What it means

Catch-all raised in the OAuth2 validation handler when an exception other than the specifically-handled httpx errors escapes — the original exception's text is embedded. This covers unexpected response shapes, JSON decode failures of the IdP payload, and similar mid-validation faults; the chained exception identifies the true cause.

Source

Thrown at litellm/proxy/auth/oauth2_check.py:213

            user_id, user_role, user_team_id = Oauth2Handler._extract_user_info(
                response_data=data,
                user_id_field_name=user_id_field_name,
                user_role_field_name=user_role_field_name,
                user_team_id_field_name=user_team_id_field_name,
            )

            return UserAPIKeyAuth(
                api_key=token,
                team_id=user_team_id,
                user_id=user_id,
                user_role=cast(LitellmUserRoles, user_role),
            )
        except httpx.HTTPStatusError as e:
            # This will catch any 4xx or 5xx errors
            raise ValueError(f"Oauth 2.0 Token validation failed: {e}")
        except Exception as e:
            # This will catch any other errors (like network issues)
            raise ValueError(f"An error occurred during token validation: {e}")

View on GitHub (pinned to 77b7c6c40c)

Solutions

1. Inspect proxy logs for the underlying exception during token validation.
2. Confirm the token format and the introspection endpoint response schema match expectations.

Example fix

Enable verbose proxy logs and retry the request to see the wrapped error.

When it happens

Trigger: Thrown at litellm/proxy/auth/oauth2_check.py:213 when the library encounters an invalid state.

Common situations: An unexpected exception occurred while validating an OAuth2 token.

AI-assisted analysis of BerriAI/litellm@77b7c6c40c (2026-08-18). Data as JSON: /api/errors/12ff838c68db67df. Report an issue: GitHub.