# SUSE-SU-2026:4251-1: cjose security update

SUSE-SU-2026:4251-1, released September 17, 2026, fixes 2 CVEs in cjose (version 0.6.1-150600.18.3.1). None of them is reported as exploited. Patch Radar priority: Urgent.

- Web page: https://patchblox.com/security/fix/linux/suse-su-2026-4251-1
- Platform: Linux
- Released: Sep 17, 2026
- Priority: Urgent (Closes CVE-2026-53939, rated Critical)
- CVEs: 2, exploited: 0, on CISA KEV: 0
- Vendor advisory: https://osv.dev/vulnerability/SUSE-SU-2026:4251-1

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [cjose](https://patchblox.com/security/data/product/linux/cjose.md) | sles 15.6 | 0.6.1-150600.18.3.1 |
| [cjose](https://patchblox.com/security/data/product/linux/cjose.md) | sles 15.7 | 0.6.1-150600.18.3.1 |

## CVEs this fix closes

| CVE | Priority | Title | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2026-53939](https://patchblox.com/security/data/cve/CVE-2026-53939.md) | Urgent | cjose: zero-filled content-encryption key generation in AES-CBC-HMAC JWE encryption within cjose can allow | 9.1 | 0.0025 |  |
| [CVE-2026-53938](https://patchblox.com/security/data/cve/CVE-2026-53938.md) | High | cjose: missing encrypted_key length validation during AES Key Wrap decryption can cause heap-based buffer | 8.2 | 0.0024 |  |

---

Data as of 2026-11-11T01:43:54Z 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

Free to use with attribution: show "Data: Patchblox Patch Radar" with a link to https://patchblox.com/security/patch-radar. Terms, including what needs a written agreement: https://patchblox.com/security/patch-radar/use-the-data

Product names, logos and trademarks shown on Patch Radar belong to their respective owners. They are used only to identify the software each security fix applies to and to help readers find their platform. Their use does not imply any affiliation with, or endorsement by, those owners, and Patchblox is not affiliated with any of them.