Tekton Pipelines git resolver has path traversal that allows reading arbitrary files from the resolver pod

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Tekton Pipelines project provides k8s-style resources for declaring CI/CD-style pipelines. Starting in version 1.0.0 and prior to versions 1.0.1, 1.3.3, 1.6.1, 1.9.2, and 1.10.2, the Tekton Pipelines git resolver is vulnerable to path traversal via the `pathInRepo` parameter. A tenant with permission to create `ResolutionRequests` (e.g. by creating `TaskRuns` or `PipelineRuns` that use the git resolver) can read arbitrary files from the resolver pod's filesystem, including ServiceAccount tokens. The file contents are returned base64-encoded in `resolutionrequest.status.data`. Versions 1.0.1, 1.3.3, 1.6.1, 1.9.2, and 1.10.2 contain a patch.

Source published

23 Mar 2026 23:55:54 UTC

Source modified

7 Sep 2026 12:05:00 UTC

Saved here

23 Oct 2026 15:48:27 UTC

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CVE Program Terms of Use

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CVSS 3.1 · 9.6 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N

Tekton Pipelines project provides k8s-style resources for declaring CI/CD-style pipelines. Starting in version 1.0.0 and prior to versions 1.0.1, 1.3.3, 1.6.1, 1.9.2, and 1.10.2, the Tekton Pipelines git resolver is vulnerable to path traversal via the `pathInRepo` parameter. A tenant with permission to create `ResolutionRequests` (e.g. by creating `TaskRuns` or `PipelineRuns` that use the git resolver) can read arbitrary files from the resolver pod's filesystem, including ServiceAccount tokens. The file contents are returned base64-encoded in `resolutionrequest.status.data`. Versions 1.0.1, 1.3.3, 1.6.1, 1.9.2, and 1.10.2 contain a patch.

Source published

Mar 23, 2026, 11:55:54 PM (timezone not stated)

Source modified

Sep 7, 2026, 12:05:00 PM (timezone not stated)

Saved here

15 Nov 2026 09:38:01 UTC

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EUVD CVSS 3.1 · 9.6 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N

Tekton Pipelines project provides k8s-style resources for declaring CI/CD-style pipelines. Starting in version 1.0.0 and prior to versions 1.0.1, 1.3.3, 1.6.1, 1.9.2, and 1.10.2, the Tekton Pipelines git resolver is vulnerable to path traversal via the `pathInRepo` parameter. A tenant with permission to create `ResolutionRequests` (e.g. by creating `TaskRuns` or `PipelineRuns` that use the git resolver) can read arbitrary files from the resolver pod's filesystem, including ServiceAccount tokens. The file contents are returned base64-encoded in `resolutionrequest.status.data`. Versions 1.0.1, 1.3.3, 1.6.1, 1.9.2, and 1.10.2 contain a patch.

Source published

24 Mar 2026 00:16:29 UTC

Source modified

7 Sep 2026 13:18:53 UTC

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25 Oct 2026 08:17:18 UTC

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NIST NVD usage terms; underlying source attribution retained

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CVSS 3.1 · [email protected] · Secondary · 9.6 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N

CVSS 3.1 · [email protected] · Primary · 9.6 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N

CVSS 3.1 · 0b0ca135-0b70-47e7-9f44-1890c2a1c46c · Secondary · 9.6 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N

### Summary The Tekton Pipelines git resolver is vulnerable to path traversal via the `pathInRepo` parameter. A tenant with permission to create `ResolutionRequests` (e.g. by creating `TaskRuns` or `PipelineRuns` that use the git resolver) can read arbitrary files from the resolver pod's filesystem, including ServiceAccount tokens. The file contents are returned base64-encoded in `resolutionrequest.status.data`. ### Details The git resolver's `getFileContent()` function in `pkg/resolution/resolver/git/repository.go` constructs a file path by joining the repository clone directory with the user-supplied `pathInRepo` parameter: ```go fileContents, err := os.ReadFile(filepath.Join(repo.directory, path)) ``` The `pathInRepo` parameter is not validated for path traversal sequences. An attacker can supply values like `../../../../etc/passwd` to escape the cloned repository directory and read arbitrary files from the resolver pod's filesystem. The vulnerability was introduced in commit `318006c4e3a5` which switched the git resolver from the go-git library (using an in-memory filesystem that cannot be escaped) to shelling out to the `git` binary and reading files with `os.ReadFile()` from the real filesystem. ### Impact **Arbitrary file read** — A namespace-scoped tenant who can create `TaskRuns` or `PipelineRuns` with git resolver parameters can read any file readable by the resolver pod process. **Credential exfiltration and privilege escalation** — The resolver pod's ServiceAccount token is readable at a well-known path (`/var/run/secrets/kubernetes.io/serviceaccount/token`). In the default RBAC configuration, the `tekton-pipelines-resolvers` ServiceAccount has `get`, `list`, and `watch` permissions on `secrets` cluster-wide. An attacker who exfiltrates this token gains the ability to read all Secrets across all namespaces, escalating from namespace-scoped access to cluster-wide secret access. ### Patches Fixed in 1.0.x, 1.3.x, 1.6.x, 1.9.x, 1.10.x. The fix validates `pathInRepo` to reject paths containing `..` components at parameter validation time, and adds a containment check using `filepath.EvalSymlinks()` to prevent symlink-based escapes from attacker-controlled repositories. ### Workarounds There is no workaround other than restricting which users can create `TaskRuns`, `PipelineRuns`, or `ResolutionRequests` that use the git resolver. Administrators can also reduce the impact by scoping the resolver pod's ServiceAccount RBAC permissions using a custom `ClusterRole` with more restrictive rules. ### Affected Versions All releases from **v1.0.0** through **v1.10.0**, including all patch releases: - v1.0.0, v1.1.0, v1.2.0 - v1.3.0, v1.3.1, v1.3.2 - v1.4.0, v1.5.0, v1.6.0, v1.7.0 - v1.9.0, v1.9.1, v1.10.0 Releases prior to v1.0.0 (e.g. v0.70.0 and earlier) are **not affected** because they used the go-git library's in-memory filesystem where path traversal cannot escape the git worktree. ### Acknowledgments This vulnerability was reported by Oleh Konko (@1seal), who provided a thorough vulnerability analysis, proof-of-concept, and review of the fix. Thank you! ### References - Fix: _(link to merged PR/commit)_ - Introduced in: `318006c4e3a5` ("fix: resolve Git Anonymous Resolver excessive memory usage")

Source published

18 Mar 2026 20:20:10 UTC

Source modified

10 Sep 2026 03:50:39 UTC

Saved here

24 Oct 2026 13:19:41 UTC

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GitHub Advisory Database · CC-BY-4.0

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CVSS_V3 · CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N

Publisher rating · CRITICAL

Path traversal in Tekton Pipelines git resolver in github.com/tektoncd/pipeline

Source published

23 Mar 2026 18:14:51 UTC

Source modified

23 Jul 2026 19:15:15 UTC

Saved here

24 Oct 2026 13:19:41 UTC

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OSV · upstream source license applies

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