# CVE-2026-22703: cosign: Cosign provides code signing and transparency for containers and binaries

CVE-2026-22703 is fixed in 6 products on 1 platform, first by DEBIAN-CVE-2026-22703, released January 10, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-22703
- Priority: Routine
- CVSS: 5.5 (medium)
- EPSS: 0.0011
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jan 10, 2026

## Description

Cosign provides code signing and transparency for containers and binaries. Prior to versions 2.6.2 and 3.0.4, Cosign bundle can be crafted to successfully verify an artifact even if the embedded Rekor entry does not reference the artifact's digest, signature or public key. When verifying a Rekor entry, Cosign verifies the Rekor entry signature, and also compares the artifact's digest, the user's public key from either a Fulcio certificate or provided by the user, and the artifact signature to the Rekor entry contents. Without these comparisons, Cosign would accept any response from Rekor as valid. A malicious actor that has compromised a user's identity or signing key could construct a valid Cosign bundle by including any arbitrary Rekor entry, thus preventing the user from being able to audit the signing event. This issue has been patched in versions 2.6.2 and 3.0.4.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | cosign Debian 14 | 2.6.2-1 | [DEBIAN-CVE-2026-22703](https://patchblox.com/security/data/fix/linux/debian-cve-2026-22703.md) | Jan 10, 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 | 0.0.20260114T191543-150000.1.137.1 | [SUSE-SU-2026:0142-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-0142-1.md) | Jan 17, 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 | 1.14.1-1.amzn2023.0.1 | [ALAS2023-2026-1420](https://patchblox.com/security/data/fix/linux/alas2023-2026-1420.md) | Feb 5, 2026 |
| Linux | trivy Fedora 43 | 0.69.3-1.fc43 | [FEDORA-2026-868E266938](https://patchblox.com/security/data/fix/linux/fedora-2026-868e266938.md) | Apr 4, 2026 |
| Linux | trivy-debuginfo Fedora 43 | 0.69.3-1.fc43 | [FEDORA-2026-868E266938](https://patchblox.com/security/data/fix/linux/fedora-2026-868e266938.md) | Apr 4, 2026 |
| Linux | trivy-debugsource Fedora 43 | 0.69.3-1.fc43 | [FEDORA-2026-868E266938](https://patchblox.com/security/data/fix/linux/fedora-2026-868e266938.md) | Apr 4, 2026 |

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Data as of 2026-11-08T13:06:02Z 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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