{"id":"CVE-2026-40161","sourceIdentifier":"security-advisories@github.com","published":"2026-04-21T17:16:53.790","lastModified":"2026-06-17T10:44:47.717","vulnStatus":"Modified","cveTags":[],"descriptions":[{"lang":"en","value":"Tekton Pipelines project provides k8s-style resources for declaring CI/CD-style pipelines. Starting in version 1.0.0 and prior to versions 1.0.2, 1.3.4, 1.6.2, 1.9.3, and 1.11.1, the Tekton Pipelines git resolver in API mode sends the system-configured Git API token to a user-controlled serverURL when the user omits the token parameter. A tenant with TaskRun or PipelineRun create permission can exfiltrate the shared API token (GitHub PAT, GitLab token, etc.) by pointing serverURL to an attacker-controlled endpoint. Versions 1.0.2, 1.3.4, 1.6.2, 1.9.3, and 1.11.1 fix the issue."}],"affected":[{"source":"security-advisories@github.com","affectedData":[{"vendor":"tektoncd","product":"pipeline","versions":[{"version":">= 1.0.0, < 1.0.2","status":"affected"},{"version":">= 1.2.0, < 1.3.4","status":"affected"},{"version":">= 1.4.0, < 1.6.2","status":"affected"},{"version":">= 1.7.0, < 1.9.3","status":"affected"},{"version":">= 1.10.0, < 1.11.1","status":"affected"}]}]}],"metrics":{"cvssMetricV31":[{"source":"security-advisories@github.com","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N","baseScore":7.7,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"CHANGED","confidentialityImpact":"HIGH","integrityImpact":"NONE","availabilityImpact":"NONE"},"exploitabilityScore":3.1,"impactScore":4.0},{"source":"nvd@nist.gov","type":"Primary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","baseScore":6.5,"baseSeverity":"MEDIUM","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"NONE","availabilityImpact":"NONE"},"exploitabilityScore":2.8,"impactScore":3.6}],"ssvcV203":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","ssvcData":{"timestamp":"2026-04-21T17:41:32.164689Z","id":"CVE-2026-40161","options":[{"exploitation":"none"},{"automatable":"no"},{"technicalImpact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}]},"weaknesses":[{"source":"security-advisories@github.com","type":"Secondary","description":[{"lang":"en","value":"CWE-201"}]},{"source":"nvd@nist.gov","type":"Primary","description":[{"lang":"en","value":"NVD-CWE-noinfo"}]}],"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:linuxfoundation:tekton_pipelines:*:*:*:*:*:go:*:*","versionStartIncluding":"1.0.0","versionEndIncluding":"1.10.0","matchCriteriaId":"4C365A15-24E6-468E-8A0F-27BA04AE4693"}]}]}],"references":[{"url":"https://github.com/tektoncd/pipeline/issues/9608","source":"security-advisories@github.com","tags":["Issue Tracking"]},{"url":"https://github.com/tektoncd/pipeline/issues/9609","source":"security-advisories@github.com","tags":["Issue Tracking"]},{"url":"https://github.com/tektoncd/pipeline/security/advisories/GHSA-wjxp-xrpv-xpff","source":"security-advisories@github.com","tags":["Vendor Advisory"]}]}