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.

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History

Thu, 12 Mar 2026 20:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Thu, 12 Mar 2026 10:15:00 +0000

Type Values Removed Values Added
First Time appeared Unitycatalog
Unitycatalog unitycatalog
Vendors & Products Unitycatalog
Unitycatalog unitycatalog

Wed, 11 Mar 2026 20:00:00 +0000

Type Values Removed Values Added
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.
Title Unity Catalog has a JWT Issuer Validation Bypass Allows Complete User Impersonation
Weaknesses CWE-1390
CWE-290
CWE-346
References
Metrics cvssV3_1

{'score': 9.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N'}


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cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-03-12T19:57:39.336Z

Reserved: 2026-02-19T19:46:03.540Z

Link: CVE-2026-27478

cve-icon Vulnrichment

Updated: 2026-03-12T19:57:35.846Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-03-11T20:16:14.810

Modified: 2026-03-12T21:08:22.643

Link: CVE-2026-27478

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-03-12T09:56:38Z

Weaknesses