CVE-2026-40938
HIGH(7.5)CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
- CVSS 7.5 — Hoch
Erwähnungen (letzte 60 Tage)
EPSS-Score
0.8%
Exploit-Wahrscheinlichkeit (30 Tage)
CVSS Score
7.5
Technische Schwere
Beschreibung
Tekton Pipelines project provides k8s-style resources for declaring CI/CD-style pipelines. Starting in version 1.0.0 and prior to versions 1.0.2, 1.3.4, 1.6.2, 1.9.3, and 1.11.1, the git resolver's revision parameter is passed directly as a positional argument to git fetch without any validation that it does not begin with a - character. Because git parses flags from mixed positional arguments, an attacker can inject arbitrary git fetch flags such as --upload-pack=<binary>. Combined with the validateRepoURL function explicitly permitting URLs that begin with / (local filesystem paths), a tenant who can submit ResolutionRequest objects can chain these two behaviors to execute an arbitrary binary on the resolver pod. The tekton-pipelines-resolvers ServiceAccount holds cluster-wide get/list/watch on all Secrets, so code execution on the resolver pod enables full cluster-wide secret exfiltration. Versions 1.0.2, 1.3.4, 1.6.2, 1.9.3, and 1.11.1 fix the issue.
Betroffene Produkte
- cpe:2.3:a:linuxfoundation:tekton_pipelines:*:*:*:*:*:go:*:*
GitHub Advisories
Tekton Pipeline: Git Resolver Unsanitized Revision Parameter Enables git Argument Injection Leading to RCE
Referenzen
- https://github.com/tektoncd/pipeline/releases/tag/v1.11.1
- https://github.com/tektoncd/pipeline/security/advisories/GHSA-94jr-7pqp-xhcq
- https://access.redhat.com/errata/RHSA-2026:17546
- https://access.redhat.com/errata/RHSA-2026:24359
- https://access.redhat.com/errata/RHSA-2026:24484
- https://access.redhat.com/errata/RHSA-2026:26519
- https://access.redhat.com/errata/RHSA-2026:26538
- https://access.redhat.com/security/cve/CVE-2026-40938
- https://bugzilla.redhat.com/show_bug.cgi?id=2460292
- https://github.com/tektoncd/pipeline/security/advisories/GHSA-94jr-7pqp-xhcq