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Withdrawn: CLEANSTART-2026-GR84261 — Security fixes in tekton-chains-fips 0.24.0-r1

2026-10-03T19:53:44.467035+00:00

Withdrawn by the publisher.

Affected: CleanStart: tekton-chains-fips

Package tekton-chains-fips version 0.24.0-r1 fixes 26 vulnerabilities: CVE-2026-33818, CVE-2026-46600, CVE-2026-56853, CVE-2026-56858, CVE-2026-56859...

EUVD-2026-320118

2026-10-03T19:53:44.467088+00:00

EUVD-2026-320118

fkie_cve-2026-25542

2026-10-03T19:53:44.467104+00:00

Tekton Pipelines project provides k8s-style resources for declaring CI/CD-style pipelines. Starting in version 0.43.0 and prior to versions 1.0.2, 1.3.4, 1.6.2, 1.9.3, and 1.11.1, trusted resources verification policies match a resource source string (refSource.URI) against spec.resources[].pattern using regexp.MatchString. In Go, regexp.MatchString reports a match if the pattern matches anywhere in the string, so common unanchored patterns (including examples in tekton documentation) can be bypassed by attacker-controlled source strings that contain the trusted pattern as a substring. This can cause an unintended policy match and change which verification mode/keys apply. Versions 1.0.2, 1.3.4, 1.6.2, 1.9.3, and 1.11.1 fix the issue.

GHSA-rmx9-2pp3-xhcr — Tekton Pipelines has VerificationPolicy regex pattern bypass via substring matching

2026-10-03T19:53:44.467131+00:00

Affected: Go: github.com/tektoncd/pipeline

hey guys,

triage contract this is a first-screen summary; deterministic proof is in the proof bundle (canonical.log/control.log/witness.txt).

summary trusted resources verification policies match a resource source string (`refSource.URI`) against `spec.resources[].pattern` using `regexp.MatchString`. in go, `regexp.MatchString` reports a match if the pattern matches anywhere in the string, so common unanchored patterns (including examples in tekton documentation) can be bypassed by attacker-controlled source strings that contain the trusted pattern as a substring. this can cause an unintended policy match and change which verification mode/keys apply.

pins - repo: https://github.com/tektoncd/pipeline - commit: 0133513db03dadb3cb08801d6b0330badcb63830 - callsite: pkg/trustedresources/verify.go:118-137 (getMatchedPolicies)

severity MEDIUM (provisional CVSS 5.3–6.5) (signing request tampering)

repro (canonical) - command: unzip -q -o poc.zip -d poc && cd poc/poc-F-TEKTON-REGEX-001 && make canonical - expected: cap not reached; canonical does not emit the vulnerability markers. - actual: cap reached; canonical emits the vulnerability markers. - canonical markers (mandatory): [CALLSITE\_HIT] + [PROOF\_MARKER]

negative control - command: unzip -q -o poc.zip -d poc && cd poc/poc-F-TEKTON-REGEX-001 && make control - expected: cap not reached under the same harness; control emits the control marker and does not emit the vulnerability markers. - control markers (mandatory): [CAL…