Vulnerability Details CVE-2026-27478
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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.0
EPSS Ranking 5.4%
CVSS Severity
CVSS v3 Score 9.1
Products affected by CVE-2026-27478
-
cpe:2.3:a:unitycatalog:unitycatalog:*