{"id":"CVE-2026-33022","aliases":["GHSA-cv4x-93xx-wgfj","GO-2026-4730"],"url":"https://o3.security/vulnerability/CVE-2026-33022","summary":"Tekton Pipelines: Controller can panic when setting long resolver names in TaskRun/PipelineRun","details":"Tekton Pipelines project provides k8s-style resources for declaring CI/CD-style pipelines. Versions 0.60.0 through 1.0.0, 1.1.0 through 1.3.2, 1.4.0 through 1.6.0, 1.7.0 through 1.9.0, 1.10.0, and 1.10.1 have a denial-of-service vulnerability in that allows any user who can create a TaskRun or PipelineRun to crash the controller cluster-wide by setting .spec.taskRef.resolver (or .spec.pipelineRef.resolver) to a string of 31+ characters. The crash occurs because GenerateDeterministicNameFromSpec produces a name exceeding the 63-character DNS-1123 label limit, and its truncation logic panics on a [-1] slice bound since the generated name contains no spaces. Once crashed, the controller enters a CrashLoopBackOff on restart (as it re-reconciles the offending resource), blocking all CI/CD reconciliation until the resource is manually deleted. Built-in resolvers (git, cluster, bundles, hub) are unaffected due to their short names, but any custom resolver name triggers the bug. The fix truncates the resolver-name prefix instead of the full string, preserving the hash suffix for determinism and uniqueness. This issue has been patched in versions 1.0.1, 1.3.3, 1.6.1, 1.9.2 and 1.10.2.","published":"2026-03-20T07:48:15.383Z","modified":"2026-07-31T18:30:27.911666790Z","cvss":{"score":6.5,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Go","name":"github.com/tektoncd/pipeline","fixedVersion":"1.0.1"},{"ecosystem":"Go","name":"github.com/tektoncd/pipeline","fixedVersion":"1.3.3"},{"ecosystem":"Go","name":"github.com/tektoncd/pipeline","fixedVersion":"1.6.1"},{"ecosystem":"Go","name":"github.com/tektoncd/pipeline","fixedVersion":"1.9.2"},{"ecosystem":"Go","name":"github.com/tektoncd/pipeline","fixedVersion":"1.10.2"}],"fix":{"url":"https://github.com/tektoncd/pipeline/commit/5eead3f859b9f938e86039e4d29185092c1d4ee6","label":"tektoncd/pipeline@5eead3f"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/33xxx/CVE-2026-33022.json"},{"type":"ADVISORY","url":"https://github.com/tektoncd/pipeline/security/advisories/GHSA-cv4x-93xx-wgfj"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-33022"},{"type":"FIX","url":"https://github.com/tektoncd/pipeline/commit/5eead3f859b9f938e86039e4d29185092c1d4ee6"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-31T18:30:27.911666790Z"}}