Vulnerability · Published Sep 15, 2026 · Assigned by GitHub_M
CVE-2026-54168Pipelines-as-Code: Unscoped GitHub App installation token allows unauthorized access to private repositories via remote task resolution
Medium 6.5
In plain English
A medium-severity privilege mismanagement in pipelines-as-code from tektoncd. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 48% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official 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, a GitHub App installation token created during webhook processing is not scoped to the repository that triggered the event when the App is installed across multiple repositories. A user with push access to one repository can submit a PipelineRun containing a pipelinesascode.tekton.dev/task remote task annotation that targets a private repository in the same installation. When ScopeTokenToListOfRepos returns no explicit scope, the missing triggering repository ID leaves the token able to access the entire installation. Pipelines-as-Code resolves and inlines the remote private task with that token, disclosing the repository's Tekton definitions. The demonstrated impact is read-only and does not provide write access. This issue is fixed in versions 0.37.8, 0.39.6, 0.42.1, and 0.48.0.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Go | github.com/openshift-pipelines/pipelines-as-code | 0.37.8 | GHSA-6f2p-296r-cc28 |
| Go | github.com/openshift-pipelines/pipelines-as-code | 0.39.6 | GHSA-6f2p-296r-cc28 |
| Go | github.com/openshift-pipelines/pipelines-as-code | 0.42.1 | GHSA-6f2p-296r-cc28 |
| Go | github.com/openshift-pipelines/pipelines-as-code | 0.48.0 | GHSA-6f2p-296r-cc28 |
| Go | github.com/openshift-pipelines/pipelines-as-code | 0.37.8, 0.39.6, 0.42.1, 0.48.0 | GO-2026-6263 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| tektoncd | pipelines-as-code | < 0.37.8>= 0.38.0, < 0.39.6>= 0.40.0, < 0.42.1>= 0.43.0, < 0.48.0 |
Weakness: CWE-269, CWE-862 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
References
- https://github.com/tektoncd/pipelines-as-code/security/advisories/GHSA-6f2p-296r-cc28 x_refsource_CONFIRM
- https://github.com/tektoncd/pipelines-as-code/commit/001782829e82b83ecb3da903f5a024ca0826b64c x_refsource_MISC
- https://github.com/tektoncd/pipelines-as-code/commit/40813976a77920feaf52671320d6d3c5ff08eb7e x_refsource_MISC
- https://github.com/tektoncd/pipelines-as-code/commit/ac6fded6dfb69ade7197d4eeed6e90ddbe1b79bc x_refsource_MISC
- https://github.com/tektoncd/pipelines-as-code/commit/e0c4a11ea3800ab9d26cf3a8ae92b74cf18527c3 x_refsource_MISC
- https://github.com/tektoncd/pipelines-as-code/releases/tag/v0.37.8 x_refsource_MISC
- https://github.com/tektoncd/pipelines-as-code/releases/tag/v0.39.6 x_refsource_MISC
- https://github.com/tektoncd/pipelines-as-code/releases/tag/v0.42.1 x_refsource_MISC
- https://github.com/tektoncd/pipelines-as-code/releases/tag/v0.48.0 x_refsource_MISC