PT-2026-34177 · Unknown · Tekton Pipelines

Offset · Published 2026-04-21 · Updated 2026-04-28 · CVE-2026-40924

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

Affected Products

Tekton Pipelines

References · 9

• 🔥 https://github.com/tektoncd/pipeline/security/advisories/GHSA-m2cx-gpqf-qf74 · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2026-40924 · Security Note
• https://osv.dev/vulnerability/GHSA-m2cx-gpqf-qf74 · Vendor Advisory
• https://github.com/tektoncd/pipeline/releases/tag/v1.11.1 · Note
• https://github.com/tektoncd/pipeline · Note
• https://reddit.com/r/VulnMatter/comments/1ssjoms/resumen_diario_de_vulnerabilidades_22042026 · Reddit Post
• https://twitter.com/infoflowcloud/status/2048482488645751189 · Twitter Post
• https://twitter.com/CVEnew/status/2048481111227932847 · Twitter Post
• https://twitter.com/_cvereports/status/2049063834350948516 · Twitter Post