PT-2026-34177 · Unknown · Tekton Pipelines

Offset · CVE-2026-40924 · Published 2026-04-21 · Updated 2026-07-30

Positive Technologies (AI Summary)

CVSS v3.1

6.5

Medium

Base vector

AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions Tekton Pipelines versions prior to 1.11.1

Description The HTTP resolver's FetchHttpResource() function reads response bodies without a size limit. A user with permissions to create TaskRuns or PipelineRuns can point the resolver to a malicious HTTP server that returns an excessively large response. This causes the tekton-pipelines-resolvers pod to be OOM-killed (Out Of Memory) by Kubernetes. Since all resolver types (Git, Hub, Bundle, Cluster, and HTTP) share the same pod, this results in a denial of service for the entire cluster's resolution service. Repeated exploitation can lead to a sustained crash loop.

Recommendations Update to version 1.11.1.

Exploit

Fix

Resource Exhaustion

Weakness Enumeration

CWE-400

Related Identifiers

CVE-2026-40924

GHSA-M2CX-GPQF-QF74

GO-2026-5486

OPENSUSE-SU-2026:21483-1

Affected Products

Tekton Pipelines

References · 1748

• 🔥 https://github.com/tektoncd/pipeline/security/advisories/GHSA-m2cx-gpqf-qf74 · Exploit
• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/40xxx/CVE-2026-40924.json · Exploit
• https://osv.dev/vulnerability/GHSA-m2cx-gpqf-qf74 · Vendor Advisory
• https://osv.dev/vulnerability/GO-2026-5486 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2026-40924 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-40924 · Security Note
• https://osv.dev/vulnerability/openSUSE-SU-2026:21483-1 · Vendor Advisory
• https://github.com/tektoncd/pipeline/releases/tag/v1.11.1 · Note
• https://github.com/tektoncd/pipeline · Note
• https://suse.com/security/cve/CVE-2025-65797 · Note
• https://suse.com/security/cve/CVE-2026-44427 · Note
• https://suse.com/security/cve/CVE-2026-27589 · Note
• https://suse.com/security/cve/CVE-2026-7736 · Note
• https://suse.com/security/cve/CVE-2026-27137 · Note
• https://suse.com/security/cve/CVE-2026-25232 · Note