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.

Urgent
CVSS
9.1
critical
Exploitation
None reported
No vendor assessment
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0025
15th percentile

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

ProductFixed inFixReleased
Linux
cjose · Debian 12.15 (bookworm) 0.6.2.1-1+deb12u2 DEBIAN-CVE-2026-53939 Sep 12, 2026
cjose · Debian 13.5 (trixie) 0.6.2.3-1+deb13u1 DEBIAN-CVE-2026-53939 Sep 12, 2026
cjose · Debian 14 0.6.2.7-1 DEBIAN-CVE-2026-53939 Sep 12, 2026
cjose · RHEL 10 0.6.2.2-7.el10_0.2 RHSA-2026:83224 Sep 8, 2026
cjose · RHEL 8 0:0.6.1-6.module+el8.10.0+25174+9c399f63 RHSA-2026:92157 Oct 30, 2026
cjose · RHEL 9 0:0.6.1-17.el9_8.2 RHSA-2026:92145 Oct 30, 2026
cjose · almalinux 10 0.6.2.2-7.el10_2.2 ALSA-2026:80605 Nov 7, 2026
cjose · almalinux 8 0.6.1-6.module_el8.10.0+4330+15616d81 ALSA-2026:92157 Nov 7, 2026
cjose · almalinux 9 0.6.1-17.el9_8.2 ALSA-2026:92145 Nov 7, 2026
cjose · amzn 2023 0.6.2.2-7.amzn2023 ALAS2023-2026-3130 Sep 28, 2026
cjose · ol 10 0:0.6.2.2-7.el10_2.2 ELSA-2026-80605 Nov 7, 2026
cjose · ol 8 0:0.6.1-6.module+el8.10.0+91088+2d069dc4 ELSA-2026-92157 Nov 7, 2026
cjose · ol 9 0:0.6.1-17.el9_8.2 ELSA-2026-92145 Nov 7, 2026
cjose · opensuse-leap 16.0 0.6.2.3-160000.3.1 OPENSUSE-SU-2026:21944-1 Sep 23, 2026
cjose · rocky 10 0:0.6.2.2-7.el10_2.2 RLSA-2026:80605 Nov 7, 2026
cjose · rocky 9 0:0.6.1-17.el9_8.2 RLSA-2026:92145 Nov 7, 2026
cjose · sles 15.6 0.6.1-150600.18.3.1 SUSE-SU-2026:4251-1 Sep 17, 2026
cjose · sles 15.7 0.6.1-150600.18.3.1 SUSE-SU-2026:4251-1 Sep 17, 2026
cjose · sles 16.0 0.6.2.3-160000.3.1 SUSE-SU-2026:23910-1 Sep 23, 2026
cjose-debuginfo · amzn 2023 0.6.2.2-7.amzn2023 ALAS2023-2026-3130 Sep 28, 2026
cjose-debugsource · amzn 2023 0.6.2.2-7.amzn2023 ALAS2023-2026-3130 Sep 28, 2026
cjose-devel · RHEL 8 0:0.6.1-6.module+el8.10.0+25174+9c399f63 RHSA-2026:92157 Oct 30, 2026
cjose-devel · RHEL 9 0:0.6.1-17.el9_8.2 RHSA-2026:92145 Oct 30, 2026
cjose-devel · almalinux 10 0.6.2.2-7.el10_2.2 ALSA-2026:80605 Nov 7, 2026
cjose-devel · almalinux 8 0.6.1-6.module_el8.10.0+4330+15616d81 ALSA-2026:92157 Nov 7, 2026
cjose-devel · almalinux 9 0.6.1-17.el9_8.2 ALSA-2026:92145 Nov 7, 2026
cjose-devel · amzn 2023 0.6.2.2-7.amzn2023 ALAS2023-2026-3130 Sep 28, 2026
cjose-devel · ol 10 0:0.6.2.2-7.el10_2.2 ELSA-2026-80605 Nov 7, 2026
cjose-devel · ol 8 0:0.6.1-6.module+el8.10.0+91088+2d069dc4 ELSA-2026-92157 Nov 7, 2026
cjose-devel · ol 9 0:0.6.1-17.el9_8.2 ELSA-2026-92145 Nov 7, 2026
mod_auth_openidc · RHEL 8 0:2.4.9.4-9.module+el8.10.0+24880+4db9166e RHSA-2026:92157 Oct 30, 2026
mod_auth_openidc · almalinux 8 2.4.9.4-9.module_el8.10.0+4297+63ae3533 ALSA-2026:92157 Nov 7, 2026
mod_auth_openidc · ol 8 0:2.4.9.4-9.module+el8.10.0+91088+2d069dc4 ELSA-2026-92157 Nov 7, 2026
mod_auth_openidc · rocky 8 0:2.4.9.4-9.module+el8.10.0+40373+8a3f15d2 RLSA-2026:92157 Nov 7, 2026

Patch Radar data is free to use with attribution. Terms and how to credit it.

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.