Kubero 3.0.0 through 3.1.1 contains an authentication bypass vulnerability that allows unauthenticated remote attackers to forge administrative JWTs by using a hardcoded fallback signing secret when JWT_SECRET is unset. Attackers can sign tokens with arbitrary role, userGroups and permissions claims, which JwtStrategy.validate() trusts without a database lookup, to take control of pipelines, applications, users and API tokens.
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Affected Vendors & Products
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Solution
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Workaround
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References
History
Mon, 09 Nov 2026 23:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | Kubero 3.0.0 through 3.1.1 contains an authentication bypass vulnerability that allows unauthenticated remote attackers to forge administrative JWTs by using a hardcoded fallback signing secret when JWT_SECRET is unset. Attackers can sign tokens with arbitrary role, userGroups and permissions claims, which JwtStrategy.validate() trusts without a database lookup, to take control of pipelines, applications, users and API tokens. | |
| Title | Kubero 3.0.0 through 3.1.1 Authentication Bypass via Hardcoded JWT Secret | |
| Weaknesses | CWE-321 | |
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| Metrics |
cvssV3_1
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MITRE
Status: PUBLISHED
Assigner: VulnCheck
Published:
Updated: 2026-11-09T23:27:41.949Z
Reserved: 2026-11-09T22:03:03.950Z
Link: CVE-2026-125370
Vulnrichment
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NVD
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OpenCVE Enrichment
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Weaknesses