CVE-2026-25542Medium· 6.5▾ SunlitA flaw was found in Tekton Pipelines. An attacker can bypass trusted resource verification policies by crafting a malicious source string that contains a trusted pattern as a substring. This is due to the `regexp.MatchString` function in G…
▾ Sunlit zone — Low / medium · no exploitation signal
impact 35.8 · likelihood 0.1 · exploitation 0
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Exploit-prediction probability, daily snapshots since Aug 2.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CSAF
0.3%
0.3% → 0.4%
Last analysed / modified upstream
— → 6.5
none → medium
A flaw was found in Tekton Pipelines. An attacker can bypass trusted resource verification policies by crafting a malicious source string that contains a trusted pattern as a substring. This is due to the regexp.MatchString function in Go matching patterns anywhere within a string, rather than requiring an exact match. This vulnerability can lead to unintended policy matches, allowing an attacker to alter verification modes or keys and potentially compromise the integrity of Continuous Integration/Continuous Delivery (CI/CD) pipelines.
github.com/tektoncd/pipeline: Tekton Pipelines: Security bypass due to regular expression matching flaw — rated Moderate by Red Hat. Released 2026-04-21, updated 2026-10-15.
Affected:
No fix planned:
Not affected:
Out of support scope
Workarounds / mitigations:
Affected packages:
github.com/tektoncd/pipeline >= 1.10.0, < 1.11.1Patched in:
github.com/tektoncd/pipeline 1.11.1Field changes observed since this record was first indexed.
Connected by shared product, vendor, weakness, or advisory.
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