Vulnerability Description
Tekton Pipelines project provides k8s-style resources for declaring CI/CD-style pipelines. Prior to 1.11.1, the HTTP resolver's FetchHttpResource function calls io.ReadAll(resp.Body) with no response body size limit. Any tenant with permission to create TaskRuns or PipelineRuns that reference the HTTP resolver can point it at an attacker-controlled HTTP server that returns a very large response body within the 1-minute timeout window, causing the tekton-pipelines-resolvers pod to be OOM-killed by Kubernetes. Because all resolver types (Git, Hub, Bundle, Cluster, HTTP) run in the same pod, crashing this pod denies resolution service to the entire cluster. Repeated exploitation causes a sustained crash loop. The same vulnerable code path is reached by both the deprecated pkg/resolution/resolver/http and the current pkg/remoteresolution/resolver/http implementations. This vulnerability is fixed in 1.11.1.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linuxfoundation | Tekton Pipelines | < 1.11.1 |
Related Weaknesses (CWE)
References
- https://github.com/tektoncd/pipeline/releases/tag/v1.11.1Release Notes
- https://github.com/tektoncd/pipeline/security/advisories/GHSA-m2cx-gpqf-qf74ExploitVendor Advisory
- https://github.com/tektoncd/pipeline/security/advisories/GHSA-m2cx-gpqf-qf74ExploitVendor Advisory
FAQ
What is CVE-2026-40924?
CVE-2026-40924 is a vulnerability with a CVSS score of 6.5 (MEDIUM). Tekton Pipelines project provides k8s-style resources for declaring CI/CD-style pipelines. Prior to 1.11.1, the HTTP resolver's FetchHttpResource function calls io.ReadAll(resp.Body) with no response ...
How severe is CVE-2026-40924?
CVE-2026-40924 has been rated MEDIUM with a CVSS base score of 6.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-40924?
Check the references section above for vendor advisories and patch information. Affected products include: Linuxfoundation Tekton Pipelines.