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Withdrawn: CLEANSTART-2026-HA54107 — Security fixes in tekton-chains 0.25.2-r1

2026-10-02T22:06:59.051990+00:00

Withdrawn by the publisher.

Affected: CleanStart: tekton-chains

Package tekton-chains version 0.25.2-r1 fixes 23 vulnerabilities: ghsa-gcjh-h69q-9w9g, ghsa-pmwq-pjrm-6p5r, CVE-2026-49478, CVE-2026-48702, CVE-2026-49834...

EUVD-2026-364302

2026-10-02T22:06:59.052050+00:00

EUVD-2026-364302

fkie_cve-2026-40938

2026-10-02T22:06:59.052067+00:00

Tekton Pipelines project provides k8s-style resources for declaring CI/CD-style pipelines. Starting in version 1.0.0 and prior to versions 1.0.2, 1.3.4, 1.6.2, 1.9.3, and 1.11.1, the git resolver's revision parameter is passed directly as a positional argument to git fetch without any validation that it does not begin with a - character. Because git parses flags from mixed positional arguments, an attacker can inject arbitrary git fetch flags such as --upload-pack=. Combined with the validateRepoURL function explicitly permitting URLs that begin with / (local filesystem paths), a tenant who can submit ResolutionRequest objects can chain these two behaviors to execute an arbitrary binary on the resolver pod. The tekton-pipelines-resolvers ServiceAccount holds cluster-wide get/list/watch on all Secrets, so code execution on the resolver pod enables full cluster-wide secret exfiltration. Versions 1.0.2, 1.3.4, 1.6.2, 1.9.3, and 1.11.1 fix the issue.

GHSA-94jr-7pqp-xhcq — Tekton Pipeline: Git Resolver Unsanitized Revision Parameter Enables git Argument Injection Leading to RCE

2026-10-02T22:06:59.052098+00:00

Affected: Go: github.com/tektoncd/pipeline

## Summary

The git resolver's `revision` parameter is passed directly as a positional argument to `git fetch` without any validation that it does not begin with a `-` character. Because git parses flags from mixed positional arguments, an attacker can inject arbitrary `git fetch` flags such as `--upload-pack=`. Combined with the `validateRepoURL` function explicitly permitting URLs that begin with `/` (local filesystem paths), a tenant who can submit `ResolutionRequest` objects can chain these two behaviors to execute an arbitrary binary on the resolver pod. The `tekton-pipelines-resolvers` ServiceAccount holds cluster-wide `get/list/watch` on all Secrets, so code execution on the resolver pod enables full cluster-wide secret exfiltration.

## Details

### Root Cause 1 — Unvalidated `revision` parameter passed to `git fetch`

`pkg/resolution/resolver/git/repository.go:85`:

```go // pkg/resolution/resolver/git/repository.go lines 84-96 // 'revision' is the raw user-supplied string from the ResolutionRequest param. // It is passed verbatim as a positional argument to git fetch: func (repo *repository) checkout(ctx context.Context, revision string) error { _, err := repo.execGit(ctx, "fetch", "origin", revision, "--depth=1") // When revision == "--upload-pack=/usr/bin/curl", git parses it as the // --upload-pack flag, not as a refspec — executing the binary locally. if err != nil { return fmt.Errorf("fetch: %w", err) } _, err = repo.exe…

RHSA-2026:17546 — Red Hat Security Advisory: Red Hat OpenShift Builds 1.8.0

2026-10-02T22:06:59.052171+00:00

github.com/tektoncd/pipeline: Tekton Pipelines: Arbitrary code execution and secret exfiltration via malicious git commands

WID-SEC-W-2026-1550 — Red Hat OpenShift: Schwachstelle ermöglicht Codeausführung und Offenlegung von Informationen

2026-10-02T22:06:59.052191+00:00

Ein entfernter, authentisierter Angreifer kann eine Schwachstelle in Red Hat OpenShift ausnutzen, um beliebigen Programmcode auszuführen, und um Informationen offenzulegen.