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.

CVSS v3 9.1 CRITICAL

9.1^/10

CVSS v3 : CRITICAL

Vector :

Exploitability : 3.9 / Impact : 5.2

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/unitycatalog/unitycatalog/security/advisories/GHSA-qqcj-rghw-829x	Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:unitycatalog:unitycatalog:*:*:*:*:data:*:*:*

History

No history.

Information

Published : 2026-03-11 20:16

Updated : 2026-03-16 20:24

NVD link : CVE-2026-27478

Mitre link : CVE-2026-27478

CVE.ORG link : CVE-2026-27478

JSON object : View

Products Affected

unitycatalog

unitycatalog

CWE

CWE-290

Authentication Bypass by Spoofing

CWE-346

Origin Validation Error

CWE-1390

Weak Authentication

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