CVE-2026-40924

Описание

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 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. Versions 1.0.2, 1.3.4, 1.6.2, 1.9.3, and 1.11.1 fix the issue.

A flaw was found in Tekton Pipelines. A local user with specific permissions to create TaskRuns or PipelineRuns can exploit this by directing the HTTP resolver to an attacker-controlled server. This server can return a very large response body, leading to the tekton-pipelines-resolvers pod consuming excessive memory and being terminated by Kubernetes. Repeated exploitation of this resource exhaustion vulnerability can cause a sustained denial of service for the entire cluster's resolution services.