CVE-2026-27478

critical · 9.1

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.

9.1

CVSS

0.2%

EPSS (exploit prob.)

8th

EPSS percentile

2026-03-11

Published

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

Weaknesses

CWE-290CWE-346CWE-1390

Affected products

Vendor	Product	Affected versions
unitycatalog	unitycatalog	<= 0.4.0

Check a specific version with /api/v1/cve/match.

References

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

Query this programmatically:

curl https://evil-db.io/api/v1/cve/CVE-2026-27478