CVE-2026-25542

MEDIUM EPSS 17.7%
Published Apr 21, 20262mo ago · Modified Jun 17, 20261w ago
6.5 CVSS 3.1
Medium
Find Similar
Published Apr 21, 2026 2mo ago
Last Modified Jun 17, 2026 1w ago

Description

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.

CVSS Details

Base Score
6.5
Exploitability
2.8
Impact
3.6
Vector string
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
Attack Vector Network
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality None
Integrity High
Availability None

Threat Intelligence

EPSS Exploit Probability
17.7% percentile
Exploit & Patch Status
Public Exploit Known
Patch Available

Weaknesses 1

CWE-185

Affected Products 1

VendorProductVersionRange
linuxfoundationtekton_pipelines*≥0.43.0  –  <1.11.0

References 2

  • github.com https://github.com/tektoncd/pipeline/commit/b8905600322aa86327baae0a7c04d6cf1207362a
    Patch
  • github.com https://github.com/tektoncd/pipeline/security/advisories/GHSA-rmx9-2pp3-xhcr
    ExploitVendor Advisory

Remediation

  • github.com https://github.com/tektoncd/pipeline/commit/b8905600322aa86327baae0a7c04d6cf1207362a
    Patch