CVE-2026-54167
Pipelines-as-Code GitHub App token request can be redirected via untrusted Enterprise Host header
- Published
- Updated
- Reserved
- Assigned by
- GitHub_M
Description
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.
Timeline
ID reserved
By GitHub_M
- 3 months later
· 3 months later
Published
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| GitHub_MCNA (assigner) | 3.1 | High8.2 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N |
| NVDNVD · Awaiting Analysis | 3.1 | High8.2 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N |
- EPSS (exploitation in 30 days)
- 0.27% · top 81% of all CVEs (7 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: yes · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 8.2.
Weakness
Affected products
- affected < 0.37.8
- affected >= 0.38.0, < 0.39.6
- affected >= 0.40.0, < 0.42.1
- affected >= 0.43.0, < 0.48.0
Affected packages
From reviewed advisories of the GitHub Advisory Database.
- Gogithub.com/openshift-pipelines/pipelines-as-codeGHSA-f5f4-3hh4-f54m (opens in a new tab)
References (9)
- https://github.com/tektoncd/pipelines-as-code/security/advisories/GHSA-f5f4-3hh4-f54m (opens in a new tab)x_refsource_CONFIRM
- https://github.com/tektoncd/pipelines-as-code/commit/402d5c7eeece881cb082ec68e9e8b61709e39ace (opens in a new tab)x_refsource_MISC
- https://github.com/tektoncd/pipelines-as-code/commit/40813976a77920feaf52671320d6d3c5ff08eb7e (opens in a new tab)x_refsource_MISC
- https://github.com/tektoncd/pipelines-as-code/commit/ac6fded6dfb69ade7197d4eeed6e90ddbe1b79bc (opens in a new tab)x_refsource_MISC
- https://github.com/tektoncd/pipelines-as-code/commit/e0c4a11ea3800ab9d26cf3a8ae92b74cf18527c3 (opens in a new tab)x_refsource_MISC
- https://github.com/tektoncd/pipelines-as-code/releases/tag/v0.37.8 (opens in a new tab)x_refsource_MISC
- https://github.com/tektoncd/pipelines-as-code/releases/tag/v0.39.6 (opens in a new tab)x_refsource_MISC
- https://github.com/tektoncd/pipelines-as-code/releases/tag/v0.42.1 (opens in a new tab)x_refsource_MISC
- https://github.com/tektoncd/pipelines-as-code/releases/tag/v0.48.0 (opens in a new tab)x_refsource_MISC
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisory GHSA-f5f4-3hh4-f54m (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2026-54167)Record last updated .