# CVE-2026-24122: cosign: Cosign provides code signing and transparency for containers and binaries

CVE-2026-24122 is fixed in 3 products on 1 platform, first by DEBIAN-CVE-2026-24122, released February 19, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-24122
- Priority: Routine
- CVSS: 3.7 (low)
- EPSS: 0.0022
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Feb 19, 2026

## Description

Cosign provides code signing and transparency for containers and binaries. In versions 3.0.4 and below, an issuing certificate with a validity that expires before the leaf certificate will be considered valid during verification even if the provided timestamp would mean the issuing certificate should be considered expired. When verifying artifact signatures using a certificate, Cosign first verifies the certificate chain using the leaf certificate's "not before" timestamp and later checks expiry of the leaf certificate using either a signed timestamp provided by the Rekor transparency log or from a timestamp authority, or using the current time. The root and all issuing certificates are assumed to be valid during the leaf certificate's validity. There is no impact to users of the public Sigstore infrastructure. This may affect private deployments with customized PKIs. This issue has been fixed in version 3.0.5.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | cosign Debian 14 | 3.0.6-1 | [DEBIAN-CVE-2026-24122](https://patchblox.com/security/data/fix/linux/debian-cve-2026-24122.md) | Feb 19, 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 | 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 | trivy opensuse-leap 16.0 | 0.74.0-160000.2.1 | [OPENSUSE-SU-2026:21801-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-21801-1.md) | Sep 7, 2026 |

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Data as of 2026-11-09T01:18:40Z 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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