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.
Published: 2026-04-21
Score: 6.5 Medium
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories
Source ID Title
Github GHSA Github GHSA GHSA-m2cx-gpqf-qf74 Tekton Pipelines: HTTP Resolver Unbounded Response Body Read Enables Denial of Service via Memory Exhaustion
History

Wed, 29 Apr 2026 12:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-770
References
Metrics threat_severity

None

threat_severity

Moderate


Mon, 27 Apr 2026 18:15:00 +0000

Type Values Removed Values Added
First Time appeared Linuxfoundation
Linuxfoundation tekton Pipelines
CPEs cpe:2.3:a:linuxfoundation:tekton_pipelines:*:*:*:*:*:go:*:*
Vendors & Products Linuxfoundation
Linuxfoundation tekton Pipelines

Wed, 22 Apr 2026 14:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Wed, 22 Apr 2026 04:00:00 +0000

Type Values Removed Values Added
First Time appeared Tektoncd
Tektoncd pipeline
Vendors & Products Tektoncd
Tektoncd pipeline

Wed, 22 Apr 2026 00:00:00 +0000

Type Values Removed Values Added
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.
Title Tekton Pipelines: HTTP Resolver Unbounded Response Body Read Enables Denial of Service via Memory Exhaustion
Weaknesses CWE-400
References
Metrics cvssV3_1

{'score': 6.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'}


Subscriptions

Linuxfoundation Tekton Pipelines
Tektoncd Pipeline
cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-04-22T13:21:28.680Z

Reserved: 2026-04-15T20:40:15.517Z

Link: CVE-2026-40924

cve-icon Vulnrichment

Updated: 2026-04-22T13:21:13.460Z

cve-icon NVD

Status : Analyzed

Published: 2026-04-21T21:16:45.720

Modified: 2026-04-27T18:06:10.710

Link: CVE-2026-40924

cve-icon Redhat

Severity : Moderate

Publid Date: 2026-04-21T20:47:47Z

Links: CVE-2026-40924 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-04-29T21:45:20Z

Weaknesses