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

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

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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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 trave…

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 trave…

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

Saved here

25 Oct 2026 08:17:18 UTC

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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

Path traversal in Tekton Pipelines git resolver allows reading arbitrary files from the resolver pod

### 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

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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Source: osv · OSV · upstream source license applies. The publisher's wording is preserved. ChangeIntel groups the information and labels changes. The JSON record includes additional source fields.