CVE-2026-27478CRITICAL 9.1EPSS p8.0%
CVE-2026-27478CVE-2026-27478
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.
Scoring
| CVSS 3.1 | 9.1 (CRITICAL) |
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N |
| EPSS | 0.18% probability of exploitation · percentile 8.0% · 2026-06-19T12:03:05Z |
| Published | 2026-03-11 |
| Last modified | 2026-03-16 |
Underlying weaknesses· 3
References
3
| Type | Target | Confidence | Tier |
|---|---|---|---|
| Weakness | Weak Authenticationcwe-1390 | 0% | live |
| Weakness | Authentication Bypass by Spoofingcwe-290 | 0% | live |
| Weakness | Origin Validation Errorcwe-346 | 0% | live |
Related by meaning· 6
Nearest entities by semantic similarity across the cs-graph corpus.