# CVE-2026-24137: golang-github-sigstore-sigstore: sigstore framework is a common go library shared across sigstore services and clients

CVE-2026-24137 is fixed in 6 products on 1 platform, first by DEBIAN-CVE-2026-24137, released January 23, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-24137
- Priority: Routine
- CVSS: 5.8 (medium)
- EPSS: 0.0039
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jan 23, 2026

## Description

sigstore framework is a common go library shared across sigstore services and clients. In versions 1.10.3 and below, the legacy TUF client (pkg/tuf/client.go) supports caching target files to disk. It constructs a filesystem path by joining a cache base directory with a target name sourced from signed target metadata; however, it does not validate that the resulting path stays within the cache base directory. A malicious TUF repository can trigger arbitrary file overwriting, limited to the permissions that the calling process has. Note that this should only affect clients that are directly using the TUF client in sigstore/sigstore or are using an older version of Cosign. Public Sigstore deployment users are unaffected, as TUF metadata is validated by a quorum of trusted collaborators. This issue has been fixed in version 1.10.4. As a workaround, users can disable disk caching for the legacy client by setting SIGSTORE_NO_CACHE=true in the environment, migrate to https://github.com/sigstore/sigstore-go/tree/main/pkg/tuf, or upgrade to the latest sigstore/sigstore release.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | apptainer sles 15.7 | 1.5.1-150600.4.24.1 | [SUSE-SU-2026:2609-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-2609-1.md) | Jun 24, 2026 |
| Linux | cosign opensuse-leap 15.6 | 3.0.5-150400.3.35.1 | [SUSE-SU-2026:0777-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-0777-1.md) | Mar 3, 2026 |
| Linux | cosign opensuse-leap 16.0 | 3.0.5-160000.1.1 | [OPENSUSE-SU-2026:20386-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-20386-1.md) | Mar 18, 2026 |
| Linux | cosign sles 15.7 | 3.0.5-150400.3.35.1 | [SUSE-SU-2026:0777-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-0777-1.md) | Mar 3, 2026 |
| Linux | cosign sles 16.0 | 3.0.5-160000.1.1 | [SUSE-SU-2026:20904-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-20904-1.md) | Mar 18, 2026 |
| Linux | golang-github-sigstore-sigstore Debian 14 | 1.10.4-1 | [DEBIAN-CVE-2026-24137](https://patchblox.com/security/data/fix/linux/debian-cve-2026-24137.md) | Jan 23, 2026 |
| Linux | govulncheck-vulndb opensuse-leap 15.6 | 0.0.20260226T182644-150000.1.149.1 | [SUSE-SU-2026:0757-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-0757-1.md) | Mar 3, 2026 |
| Linux | govulncheck-vulndb opensuse-leap 16.0 | 0.0.20260723T184607-160000.1.1 | [OPENSUSE-SU-2026:21483-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-21483-1.md) | Jul 30, 2026 |
| Linux | runfinch-finch amzn 2023 | 1.15.1-1.amzn2023.0.1 | [ALAS2023-2026-1507](https://patchblox.com/security/data/fix/linux/alas2023-2026-1507.md) | Mar 30, 2026 |
| Linux | vexctl opensuse-leap 15.6 | 0.4.1+git78.f951e3a-150000.1.11.1 | [SUSE-SU-2026:0592-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-0592-1.md) | Feb 20, 2026 |
| Linux | vexctl opensuse-leap 16.0 | 0.4.4+git20.5d61136-160000.1.1 | [OPENSUSE-SU-2026:21481-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-21481-1.md) | Jul 30, 2026 |

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Data as of 2026-11-08T19:12:23Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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