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MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-54167
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-15 15:17:17 UTC
Updated2026-09-15 15:17:17 UTC
DescriptionPipelines-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.

Risk And Classification

Primary CVSS: v3.1 8.2 HIGH from [email protected]

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N

Problem Types: CWE-345 | CWE-345 CWE-345: Insufficient Verification of Data Authenticity

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary8.2HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N
3.1CNADECLARED8.2HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
Low
Availability
None

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Tektoncd Pipelines-as-code affected < 0.37.8 Not specified
CNA Tektoncd Pipelines-as-code affected >= 0.38.0, < 0.39.6 Not specified
CNA Tektoncd Pipelines-as-code affected >= 0.40.0, < 0.42.1 Not specified
CNA Tektoncd Pipelines-as-code affected >= 0.43.0, < 0.48.0 Not specified

References

ReferenceSourceLinkTags
github.com/tektoncd/pipelines-as-code/security/advisories/GHSA-f5f4-3hh4... [email protected] github.com
github.com/tektoncd/pipelines-as-code/commit/ac6fded6dfb69ade7197d4eeed6... [email protected] github.com
github.com/tektoncd/pipelines-as-code/releases/tag/v0.42.1 [email protected] github.com
github.com/tektoncd/pipelines-as-code/commit/40813976a77920feaf52671320d... [email protected] github.com
github.com/tektoncd/pipelines-as-code/commit/e0c4a11ea3800ab9d26cf3a8ae9... [email protected] github.com
github.com/tektoncd/pipelines-as-code/releases/tag/v0.37.8 [email protected] github.com
github.com/tektoncd/pipelines-as-code/releases/tag/v0.39.6 [email protected] github.com
github.com/tektoncd/pipelines-as-code/releases/tag/v0.48.0 [email protected] github.com
github.com/tektoncd/pipelines-as-code/commit/402d5c7eeece881cb082ec68e9e... [email protected] github.com
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