CVE-2026-54167
HighCVSS 8.2Exploitation Probability (EPSS)
Low risk17th percentile - higher than 17% of all known CVEs
Summary
Vulnerability in Pipelines-as-Code before 0.37.8, 0.39.6, 0.42.1, and 0.48.0. The GitHub App provider accepts X-GitHub-Enterprise-Host as the API host while processing webhook events before signature validation or host confirmation. An unauthenticated attacker reaching the webhook endpoint can select an attacker-controlled host and cause the controller to send a locally signed GitHub App JWT to that service.
Risk Assessment
The exposed JWT may be used to attempt to mint installation access tokens during its validity window, potentially leading to unauthorized access to repositories and data.
Recommendation
Update Pipelines-as-Code to one of the fixed versions and restrict access to the webhook endpoint.
Other vulnerabilities in Pipelines-as-Code
Original NVD description (English source)
Pipelines-as-Code is a CI/CD system that lets users define Tekton pipelines in source code repositories. Prior to 0.37.8, 0.39.6, 0.42.1, and 0.48.0, the GitHub App provider accepts X-GitHub-Enterprise-Host as the API host while processing webhook events containing an installation.id, before webhook signature validation or confirmation that the host matches the repository URL in the signed payload. An unauthenticated attacker who can reach the webhook endpoint can select an attacker-controlled host and cause the controller to send a locally signed GitHub App JWT to that service. The exposed JWT may be used to attempt to mint installation access tokens during its validity window, subject to the GitHub App installation and permissions. The incoming webhook installation-lookup path is also affected, but exploitation of that path requires the valid incoming webhook secret for the target Repository CR. This issue is fixed in versions 0.37.8, 0.39.6, 0.42.1, and 0.48.0.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS