Critical severity9.8NVD Advisory· Published Nov 10, 2026· Updated Nov 10, 2026

CVE-2026-125370

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.

Affected products

Kubero Dev/kuberollm-fuzzy
Range: 3.0.0 - 3.1.1

Patches

Vulnerability mechanics

References

github.com/kubero-dev/kubero/blob/bcb52376b19347b8c36bc445ddf3e4bff4a5c168/server/src/auth/strategies/jwt.strategy.tsnvd
github.com/kubero-dev/kubero/issues/786nvd
www.vulncheck.com/advisories/kubero-3.0.0-through-3.1.1-authentication-bypass-via-hardcoded-jwt-secretnvd

News mentions

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