# CVE-2026-53939: cjose: CJose is C library implementing the Javascript Object Signing and Encryption (JOSE) CVE-2026-53939 is fixed in 5 products on 1 platform, first by RHSA-2026:83224, released September 8, 2026. It is not reported as exploited. Patch Radar priority: Urgent. - Web page: https://patchblox.com/security/cve/CVE-2026-53939 - Priority: Urgent - CVSS: 9.1 (critical) - EPSS: 0.0025 - CISA KEV: not listed - Exploited (vendor report): no - Publicly disclosed: no - Published: Sep 8, 2026 ## Description CJose is C library implementing the Javascript Object Signing and Encryption (JOSE). Security Fix(es): * cjose: OpenIDC/cjose uses all-zero Content Encryption Key for AES-CBC-HMAC JWE encryption (CVE-2026-53939) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section. ## Where it's fixed | Platform | Product | Fixed in | Fix | Released | |---|---|---|---|---| | Linux | cjose Debian 12.15 (bookworm) | 0.6.2.1-1+deb12u2 | [DEBIAN-CVE-2026-53939](https://patchblox.com/security/data/fix/linux/debian-cve-2026-53939.md) | Sep 12, 2026 | | Linux | cjose Debian 13.5 (trixie) | 0.6.2.3-1+deb13u1 | [DEBIAN-CVE-2026-53939](https://patchblox.com/security/data/fix/linux/debian-cve-2026-53939.md) | Sep 12, 2026 | | Linux | cjose Debian 14 | 0.6.2.7-1 | [DEBIAN-CVE-2026-53939](https://patchblox.com/security/data/fix/linux/debian-cve-2026-53939.md) | Sep 12, 2026 | | Linux | cjose RHEL 10 | 0.6.2.2-7.el10_0.2 | [RHSA-2026:83224](https://patchblox.com/security/data/fix/linux/rhsa-2026-83224.md) | Sep 8, 2026 | | Linux | cjose RHEL 8 | 0:0.6.1-6.module+el8.10.0+25174+9c399f63 | [RHSA-2026:92157](https://patchblox.com/security/data/fix/linux/rhsa-2026-92157.md) | Oct 30, 2026 | | Linux | cjose RHEL 9 | 0:0.6.1-17.el9_8.2 | [RHSA-2026:92145](https://patchblox.com/security/data/fix/linux/rhsa-2026-92145.md) | Oct 30, 2026 | | Linux | cjose almalinux 10 | 0.6.2.2-7.el10_2.2 | [ALSA-2026:80605](https://patchblox.com/security/data/fix/linux/alsa-2026-80605.md) | Nov 7, 2026 | | Linux | cjose almalinux 8 | 0.6.1-6.module_el8.10.0+4330+15616d81 | [ALSA-2026:92157](https://patchblox.com/security/data/fix/linux/alsa-2026-92157.md) | Nov 7, 2026 | | Linux | cjose almalinux 9 | 0.6.1-17.el9_8.2 | [ALSA-2026:92145](https://patchblox.com/security/data/fix/linux/alsa-2026-92145.md) | Nov 7, 2026 | | Linux | cjose amzn 2023 | 0.6.2.2-7.amzn2023 | [ALAS2023-2026-3130](https://patchblox.com/security/data/fix/linux/alas2023-2026-3130.md) | Sep 28, 2026 | | Linux | cjose ol 10 | 0:0.6.2.2-7.el10_2.2 | [ELSA-2026-80605](https://patchblox.com/security/data/fix/linux/elsa-2026-80605.md) | Nov 7, 2026 | | Linux | cjose ol 8 | 0:0.6.1-6.module+el8.10.0+91088+2d069dc4 | [ELSA-2026-92157](https://patchblox.com/security/data/fix/linux/elsa-2026-92157.md) | Nov 7, 2026 | | Linux | cjose ol 9 | 0:0.6.1-17.el9_8.2 | [ELSA-2026-92145](https://patchblox.com/security/data/fix/linux/elsa-2026-92145.md) | Nov 7, 2026 | | Linux | cjose opensuse-leap 16.0 | 0.6.2.3-160000.3.1 | [OPENSUSE-SU-2026:21944-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-21944-1.md) | Sep 23, 2026 | | Linux | cjose rocky 10 | 0:0.6.2.2-7.el10_2.2 | [RLSA-2026:80605](https://patchblox.com/security/data/fix/linux/rlsa-2026-80605.md) | Nov 7, 2026 | | Linux | cjose rocky 9 | 0:0.6.1-17.el9_8.2 | [RLSA-2026:92145](https://patchblox.com/security/data/fix/linux/rlsa-2026-92145.md) | Nov 7, 2026 | | Linux | cjose sles 15.6 | 0.6.1-150600.18.3.1 | [SUSE-SU-2026:4251-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-4251-1.md) | Sep 17, 2026 | | Linux | cjose sles 15.7 | 0.6.1-150600.18.3.1 | [SUSE-SU-2026:4251-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-4251-1.md) | Sep 17, 2026 | | Linux | cjose sles 16.0 | 0.6.2.3-160000.3.1 | [SUSE-SU-2026:23910-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-23910-1.md) | Sep 23, 2026 | | Linux | cjose-debuginfo amzn 2023 | 0.6.2.2-7.amzn2023 | [ALAS2023-2026-3130](https://patchblox.com/security/data/fix/linux/alas2023-2026-3130.md) | Sep 28, 2026 | | Linux | cjose-debugsource amzn 2023 | 0.6.2.2-7.amzn2023 | [ALAS2023-2026-3130](https://patchblox.com/security/data/fix/linux/alas2023-2026-3130.md) | Sep 28, 2026 | | Linux | cjose-devel RHEL 8 | 0:0.6.1-6.module+el8.10.0+25174+9c399f63 | [RHSA-2026:92157](https://patchblox.com/security/data/fix/linux/rhsa-2026-92157.md) | Oct 30, 2026 | | Linux | cjose-devel RHEL 9 | 0:0.6.1-17.el9_8.2 | [RHSA-2026:92145](https://patchblox.com/security/data/fix/linux/rhsa-2026-92145.md) | Oct 30, 2026 | | Linux | cjose-devel almalinux 10 | 0.6.2.2-7.el10_2.2 | [ALSA-2026:80605](https://patchblox.com/security/data/fix/linux/alsa-2026-80605.md) | Nov 7, 2026 | | Linux | cjose-devel almalinux 8 | 0.6.1-6.module_el8.10.0+4330+15616d81 | [ALSA-2026:92157](https://patchblox.com/security/data/fix/linux/alsa-2026-92157.md) | Nov 7, 2026 | | Linux | cjose-devel almalinux 9 | 0.6.1-17.el9_8.2 | [ALSA-2026:92145](https://patchblox.com/security/data/fix/linux/alsa-2026-92145.md) | Nov 7, 2026 | | Linux | cjose-devel amzn 2023 | 0.6.2.2-7.amzn2023 | [ALAS2023-2026-3130](https://patchblox.com/security/data/fix/linux/alas2023-2026-3130.md) | Sep 28, 2026 | | Linux | cjose-devel ol 10 | 0:0.6.2.2-7.el10_2.2 | [ELSA-2026-80605](https://patchblox.com/security/data/fix/linux/elsa-2026-80605.md) | Nov 7, 2026 | | Linux | cjose-devel ol 8 | 0:0.6.1-6.module+el8.10.0+91088+2d069dc4 | [ELSA-2026-92157](https://patchblox.com/security/data/fix/linux/elsa-2026-92157.md) | Nov 7, 2026 | | Linux | cjose-devel ol 9 | 0:0.6.1-17.el9_8.2 | [ELSA-2026-92145](https://patchblox.com/security/data/fix/linux/elsa-2026-92145.md) | Nov 7, 2026 | | Linux | mod_auth_openidc RHEL 8 | 0:2.4.9.4-9.module+el8.10.0+24880+4db9166e | [RHSA-2026:92157](https://patchblox.com/security/data/fix/linux/rhsa-2026-92157.md) | Oct 30, 2026 | | Linux | mod_auth_openidc almalinux 8 | 2.4.9.4-9.module_el8.10.0+4297+63ae3533 | [ALSA-2026:92157](https://patchblox.com/security/data/fix/linux/alsa-2026-92157.md) | Nov 7, 2026 | | Linux | mod_auth_openidc ol 8 | 0:2.4.9.4-9.module+el8.10.0+91088+2d069dc4 | [ELSA-2026-92157](https://patchblox.com/security/data/fix/linux/elsa-2026-92157.md) | Nov 7, 2026 | | Linux | mod_auth_openidc rocky 8 | 0:2.4.9.4-9.module+el8.10.0+40373+8a3f15d2 | [RLSA-2026:92157](https://patchblox.com/security/data/fix/linux/rlsa-2026-92157.md) | Nov 7, 2026 | --- Data as of 2026-11-09T19:38:12Z UTC. 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