CVE-2026-27478: Unitycatalog

Critical severity, CVSS 9.1. EPSS: 0.2% chance of exploitation in the next 30 days.

Unity Catalog is an open, multi-modal Catalog for data and AI. In 0.4.0 and earlier, a critical authentication bypass vulnerability exists in the Unity Catalog token exchange endpoint (/api/1.0/unity-control/auth/tokens). The endpoint extracts the issuer (iss) claim from incoming JWTs and uses it to dynamically fetch the JWKS endpoint for signature validation without validating that the issuer is a trusted identity provider.

Affected products

• Unitycatalog Unitycatalog: up to and including 0.4.0

Published 2026-03-11. Last modified 2026-06-17.