{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "cpe": "cpe:2.3:a:linuxfoundation:tekton_pipelines:*:*:*:*:*:go:*:*",
            "extracted_events": [
              {
                "introduced": "0.43.0"
              },
              {
                "fixed": "1.11.0"
              }
            ],
            "source": [
              "CPE_RANGE",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "45e6ed63348f9c00cc4374df4a07da1553dfa0cf"
            },
            {
              "fixed": "383d57b75e404e1f6f490ed62aba9d36a98a9ff6"
            },
            {
              "fixed": "b8905600322aa86327baae0a7c04d6cf1207362a"
            }
          ],
          "repo": "https://github.com/tektoncd/pipeline",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-rmx9-2pp3-xhcr"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-185"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/25xxx/CVE-2026-25542.json"
  },
  "details": "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.",
  "id": "CVE-2026-25542",
  "modified": "2026-07-08T05:37:12.017903191Z",
  "published": "2026-04-21T16:05:43.217Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/25xxx/CVE-2026-25542.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/tektoncd/pipeline/security/advisories/GHSA-rmx9-2pp3-xhcr"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-25542"
    },
    {
      "type": "FIX",
      "url": "https://github.com/tektoncd/pipeline/commit/b8905600322aa86327baae0a7c04d6cf1207362a"
    }
  ],
  "schema_version": "1.7.5",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Tekton Pipelines: VerificationPolicy regex pattern bypass via substring matching"
}