CVE-2026-27478

Summary

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.

Affected Software

Weaknesses

• CWE-290: CWE-290: Authentication Bypass by Spoofing
• CWE-346: CWE-346: Origin Validation Error
• CWE-1390: CWE-1390: Weak Authentication

ADP Enrichment

CISA ADP Vulnrichment

• SSVC:
• Exploitation: none
  • Automatable: yes
  • Technical Impact: total

References

• https://github.com/unitycatalog/unitycatalog/security/advisories/GHSA-qqcj-rghw-829x

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