CVE-2026-25542 (GCVE-0-2026-25542)

Vulnerability from cvelistv5 – Published: 2026-04-21 16:05 – Updated: 2026-05-22 16:06
VLAI
Title
Tekton Pipelines: VerificationPolicy regex pattern bypass via substring matching
Summary
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.
Severity
6.5 (Medium)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-04-21 16:48 UTC
CWE
  • CWE-185 - Incorrect Regular Expression
Assigner
GitHub_M CNA under the mitre root
CNA scorecard C 72/100 over 7974 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
tektoncd pipeline Affected: >= 0.43.0, < 1.0.2
Affected: >= 1.2.0, < 1.3.4
Affected: >= 1.4.0, < 1.6.2
Affected: >= 1.7.0, < 1.9.3
Affected: >= 1.10.0, < 1.11.1
guessed Create a notification for this product.
Show details on NVD website
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