CVE-2026-27478

CriticalCVSS 9.1/10Last modified Jun 17, 2026

Description

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.

Metrics

CVSS 3.1 9.1/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Weakness enumeration

CWE-290 CWE-346 CWE-1390

Affected software

No affected versions have been published.

Timeline

Published: Mar 11, 2026
Last modified: Jun 17, 2026
NVD status: Analyzed

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