CVE-2026-27478

CRITICAL
2026-03-11 [email protected]
9.1
CVSS 3.1
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CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
None

Lifecycle Timeline

2
Analysis Generated
Mar 12, 2026 - 22:07 vuln.today
CVE Published
Mar 11, 2026 - 20:16 nvd
CRITICAL 9.1

Tags

Authentication Bypass AI / ML

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.

Analysis

Auth bypass in Unity Catalog 0.4.0 and earlier.

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Remediation

Within 24 hours: Inventory all systems running Unity Catalog 0.4.0 or earlier and isolate them from production networks if possible; enable enhanced logging on token exchange endpoints (/api/1.0/unity-control/auth/tokens). Within 7 days: Implement network-level access controls restricting token endpoint access to authorized IPs only; conduct forensic review of authentication logs for suspicious token requests. …

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Priority Score

46
Low Medium High Critical
KEV: 0
EPSS: +0.0
CVSS: +46
POC: 0

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CVE-2026-27478 vulnerability details – vuln.today
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