Denial of Service Vulnerability in Tekton Pipelines from Tekton
CVE-2026-33022

6.5MEDIUM

Key Information:

Vendor

Tektoncd

Status
Pipeline
Vendor
CVE Published:
20 March 2026

What is CVE-2026-33022?

Tekton Pipelines, designed for CI/CD automation, is affected by a denial-of-service vulnerability that allows users to crash the controller by providing an excessively long resolver string in TaskRun or PipelineRun resources. This incident leads to a crash loop, preventing CI/CD operations until manual intervention is performed to remove the offending resource. Built-in resolvers remain unaffected, while any custom resolver can exploit this weakness. The issue has been addressed in newer versions by ensuring resolver names are properly truncated, maintaining system stability and functionality.

Affected Version(s)

pipeline >= 0.60.0, < 1.0.1 < 0.60.0, 1.0.1

pipeline >= 1.1.0, < 1.3.3 < 1.1.0, 1.3.3

pipeline >= 1.4.0, < 1.6.1 < 1.4.0, 1.6.1

References

https://github.com/tektoncd/pipeline/security/advisories/...
x_refsource_CONFIRM
https://github.com/tektoncd/pipeline/commit/5eead3f859b9f...
x_refsource_MISC

CVSS V3.1

Score:
6.5
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.