RHSA-2026:21932HighCVSS 9.6

Red Hat Security Advisory: Red Hat OpenShift Pipelines Release 1.20.5

Published
May 29, 2026
Last Modified
July 27, 2026

🔗 CVE IDs covered (3)

CVE-2026-34986 →CVE-2026-33186 →CVE-2026-33211 →

📋 Description

CVE-2026-33186 — google.golang.org/grpc/grpc-go: google.golang.org/grpc/authz: gRPC-Go: Authorization bypass due to improper HTTP/2 path validation CVE-2026-33211 — Tekton Pipelines: github.com/tektoncd/pipeline: Tekton Pipelines: Information disclosure via path traversal in git resolver CVE-2026-34986 — github.com/go-jose/go-jose/v3: github.com/go-jose/go-jose/v4: Go JOSE: Denial of Service via crafted JSON Web Encryption (JWE) object

🎯 Affected products2

  • Red Hat OpenShift Pipelines 1.2
  • registry.redhat.io/openshift-pipelines/pipelines-operator-bundle@sha256:f4100f181620f5424e66633dbdd3c7402c8db75f93c54fe092ff2301d8dd0015_amd64 as a component of Red Hat OpenShift Pipelines 1.2

✅ Remediation

Red Hat OpenShift Pipelines is a cloud-native, continuous integration and continuous delivery (CI/CD) solution based on Kubernetes resources. It uses Tekton building blocks to automate deployments across multiple platforms by abstracting away the underlying implementation details. Tekton introduces a number of standard custom resource definitions (CRDs) for defining CI/CD pipelines that are portable across Kubernetes distributions. Workaround: To mitigate this issue, implement infrastructure-level normalization to ensure all incoming HTTP/2 `:path` headers are properly formatted with a leading slash before reaching the gRPC-Go server. This can be achieved by configuring a reverse proxy or API gateway to validate and normalize the `:path` header. Ensure that any such intermediary is properly configured and restarted to apply the changes, which may temporarily impact service availability. Workaround: To mitigate this vulnerability, restrict the creation of ResolutionRequests to trusted users and service accounts. Implement strict Role-Based Access Control (RBAC) policies to limit which tenants can create TaskRuns or PipelineRuns that utilize the Tekton Pipelines git resolver. This reduces the exposure by preventing unauthorized access to the resolver pod's filesystem. Workaround: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.

🔗 References (7)