CVE-2026-40938
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.
- CVSS 3.1
- 8.5
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H - EPSS
- 0.8% chance of exploitation in the next 30 days; higher than 55% of CVEs (scores of 2026-10-26)
- CWE
- CWE-88
- Published
- Modified
- Record from
- the NVD, synced
Affected
- linuxfoundation:tekton_pipelines
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-94jr-7pqp-xhcq | Go | github.com/tektoncd/pipeline | >=1.10.0 <1.11.1 | 1.11.1 |
| GHSA-94jr-7pqp-xhcq | Go | github.com/tektoncd/pipeline | >=1.7.0 <1.9.3 | 1.9.3 |
| GHSA-94jr-7pqp-xhcq | Go | github.com/tektoncd/pipeline | >=1.4.0 <1.6.2 | 1.6.2 |
| GHSA-94jr-7pqp-xhcq | Go | github.com/tektoncd/pipeline | >=1.2.0 <1.3.4 | 1.3.4 |
| GHSA-94jr-7pqp-xhcq | Go | github.com/tektoncd/pipeline | >=1.0.0 <1.0.2 | 1.0.2 |
| GO-2026-5272 | Go | github.com/tektoncd/pipeline | >=1.0.0 <1.0.2 >=1.1.0 <1.3.4 >=1.4.0 <1.6.2 >=1.7.0 <1.9.3 >=1.10.0 <1.11.1 | 1.0.2, 1.3.4, 1.6.2, 1.9.3, 1.11.1 |