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.
CVE-2026-54167
This high-severity CVE scores 8.2 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.2%, top 92% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).
- High severity, but no confirmed exploitation yet
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 8.2
- EG Score
- 8.2(medium)
- EG Risk
- 52(Track)EG Risk 52/100SSVC: Track
EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).
How it’s computedSeverity82% × 45%Exploitation0% × 40%Automatability100% × 15%Action: Routine — remediate on your standard cadence. - EPSS PROB
- 0%
- EPSS %ILE
- 8%
- KEV
- Not listed
Published
August 20, 2026
Last Modified
September 15, 2026
Advisory Details (9)
Auto-updated Sep 15, 2026v0.48.0
Patch available: tektoncd/pipelines-as-code v0.48.0
https://github.com/tektoncd/pipelines-as-code/releases/tag/v0.48.0v0.42.1
Patch available: tektoncd/pipelines-as-code v0.42.1
https://github.com/tektoncd/pipelines-as-code/releases/tag/v0.42.1v0.39.6
Patch available: tektoncd/pipelines-as-code v0.39.6
https://github.com/tektoncd/pipelines-as-code/releases/tag/v0.39.6v0.37.8
Patch available: tektoncd/pipelines-as-code v0.37.8
https://github.com/tektoncd/pipelines-as-code/releases/tag/v0.37.8commit e0c4a11ea380 (tektoncd/pipelines-as-code)
Fix landed in tektoncd/pipelines-as-code commit e0c4a11ea380 — awaiting tagged release
https://github.com/tektoncd/pipelines-as-code/commit/e0c4a11ea3800ab9d26cf3a8ae92b74cf18527c3commit ac6fded6dfb6 (tektoncd/pipelines-as-code)
Fix landed in tektoncd/pipelines-as-code commit ac6fded6dfb6 — awaiting tagged release
https://github.com/tektoncd/pipelines-as-code/commit/ac6fded6dfb69ade7197d4eeed6e90ddbe1b79bccommit 40813976a779 (tektoncd/pipelines-as-code)
Fix landed in tektoncd/pipelines-as-code commit 40813976a779 — awaiting tagged release
https://github.com/tektoncd/pipelines-as-code/commit/40813976a77920feaf52671320d6d3c5ff08eb7ecommit 402d5c7eeece (tektoncd/pipelines-as-code)
Fix landed in tektoncd/pipelines-as-code commit 402d5c7eeece — awaiting tagged release
https://github.com/tektoncd/pipelines-as-code/commit/402d5c7eeece881cb082ec68e9e8b61709e39acePipelines-as-Code GitHub App token request can be redirected via untrusted Enterprise Host header · Advisory · tektoncd/pipelines-as-code · GitHub
https://github.com/tektoncd/pipelines-as-code/security/advisories/GHSA-f5f4-3hh4-f54mVendor Advisories for CVE-2026-54167(1)
These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.
Affected Packages
(1 across 1 ecosystem)
Go(1)
| Package | Vulnerable range | Fixed in | Dependents |
|---|---|---|---|
| github.com/openshift-pipelines/pipelines-as-code | — | 0.48.0 | — |
Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 9× in last 7d / 9× in last 30d)
Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.
- 2026-09-19 21:29 UTCEG score recompute
- 2026-09-18 22:57 UTCEG score recompute
- 2026-09-18 19:28 UTCEPSS rescore
- 2026-09-18 00:26 UTCEG score recompute
- 2026-09-17 19:31 UTCEPSS rescore
- 2026-09-16 14:22 UTCEG score recompute
- 2026-09-16 14:08 UTCEPSS rescore
- 2026-09-15 15:34 UTCEG score recompute
- 2026-09-15 15:02 UTCEG score recompute
- 2026-08-20 18:42 UTCEG score recompute
Frequently asked(5)
What is CVE-2026-54167?
When was CVE-2026-54167 disclosed?
Is CVE-2026-54167 actively exploited?
What is the CVSS score of CVE-2026-54167?
How do I remediate CVE-2026-54167?
Dependency Blast Radius
See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-54167
Is Your Infrastructure Affected by CVE-2026-54167?
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