CVE-2026-27478

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Source

https://cve.org/CVERecord?id=CVE-2026-27478

Import Source

https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-27478.json

JSON Data

https://api.osv.dev/v1/vulns/CVE-2026-27478

Aliases

GHSA-qqcj-rghw-829x

Published

2026-03-11T19:36:03.271Z

Modified

2026-04-10T05:38:26.779333Z

Severity

9.1 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N CVSS Calculator

Summary

Unity Catalog has a JWT Issuer Validation Bypass Allows Complete User Impersonation

Details

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.

Database specific

{
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-1390",
        "CWE-290",
        "CWE-346"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/27xxx/CVE-2026-27478.json"
}

References

Affected packages

Git / github.com/unitycatalog/unitycatalog

Affected ranges

Type

GIT

Repo

https://github.com/unitycatalog/unitycatalog

Events

Introduced

Last affected

4fa81306825341728580f0ecd2733b58a029e53a

Database specific

{
    "versions": [
        {
            "introduced": "0"
        },
        {
            "last_affected": "0.4.0"
        }
    ]
}

Affected versions

ai-v0.*

ai-v0.3.0

v0.*

v0.4.0

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-27478.json"