{"affected":[{"defaultStatus":"unaffected","product":"kubero","source":"CNA: VulnCheck","vendor":"kubero-dev","versions":[{"lessThanOrEqual":"3.1.1","status":"affected","version":"3.0.0","versionType":"semver"}]}],"cveId":"CVE-2026-125370","cwes":["CWE-321"],"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.","epss":null,"exploits":[],"kev":null,"metrics":[{"score":9.3,"severity":"critical","source":"CNA: VulnCheck","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","version":"4.0"},{"score":9.8,"severity":"critical","source":"CNA: VulnCheck","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.1"}],"modifiedAt":1794266861949,"publishedAt":1794266861949,"references":[{"source":"CNA: VulnCheck","tags":["issue-tracking"],"url":"https://github.com/kubero-dev/kubero/issues/786"},{"source":"CNA: VulnCheck","tags":["product"],"url":"https://github.com/kubero-dev/kubero"},{"source":"CNA: VulnCheck","tags":["technical-description"],"url":"https://github.com/kubero-dev/kubero/blob/bcb52376b19347b8c36bc445ddf3e4bff4a5c168/server/src/auth/strategies/jwt.strategy.ts#L13-L32"},{"source":"CNA: VulnCheck","tags":["third-party-advisory"],"url":"https://www.vulncheck.com/advisories/kubero-3.0.0-through-3.1.1-authentication-bypass-via-hardcoded-jwt-secret"}],"remediation":[],"revision":"014353fb02df38b17393abecab67584c9527d3264a672c1b52e4b81abc75d5c3","sources":[{"modifiedAt":1794266861949,"name":"CNA: VulnCheck","retrievedAt":1794269333182,"url":"https://www.cve.org/CVERecord?id=CVE-2026-125370"}],"ssvc":null,"status":"published","title":"Kubero 3.0.0 through 3.1.1 Authentication Bypass via Hardcoded JWT Secret","updatedAt":1794269333182}