ALSA-2026:92157: Critical: mod_auth_openidc:2.3 security update

Q: Which deployments are most likely exposed to this issue?

Deployments using mod_auth_openidc with the cjose library are relevant, particularly where JWE encryption using AES-CBC-HMAC is in use. The listed affected software includes cjose, cjose-devel, and mod_auth_openidc for AlmaLinux.

Q: What cryptographic condition is involved?

The issue concerns JWE encryption with AES-CBC-HMAC, where cjose uses an all-zero Content Encryption Key. The provided information does not state which configurations enable or invoke this encryption mode.

Q: How can administrators determine whether their systems need the update?

Administrators should identify AlmaLinux systems with cjose, cjose-devel, or mod_auth_openidc installed and compare their installed packages against the ALSA-2026:92157 security update. The advisory identifies CVE-2026-53939 as the addressed issue.

Published Oct 29, 2026

Updated

The modauthopenidc is an OpenID Connect authentication module for Apache HTTP Server. It enables an Apache HTTP Server to operate as an OpenID Connect Relying Party and/or OAuth 2.0 Resource Server.

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.

Affected Software

3 affected componentsFixes available

almalinux/cjose<0.6.1-6.module_el8.10.0+4330+15616d81

0.6.1-6.module_el8.10.0+4330+15616d81

almalinux/cjose-devel<0.6.1-6.module_el8.10.0+4330+15616d81

0.6.1-6.module_el8.10.0+4330+15616d81

almalinux/mod_auth_openidc<2.4.9.4-9.module_el8.10.0+4297+63ae3533

2.4.9.4-9.module_el8.10.0+4297+63ae3533

Remediation

Recommended actions to resolve this vulnerability, in priority order.

Upgrade
Upgrade almalinux/cjose to a version that resolves this vulnerability.
Fixed in 0.6.1-6.module_el8.10.0+4330+15616d81
Upgrade
Upgrade almalinux/cjose-devel to a version that resolves this vulnerability.
Fixed in 0.6.1-6.module_el8.10.0+4330+15616d81
Upgrade
Upgrade almalinux/mod_auth_openidc to a version that resolves this vulnerability.
Fixed in 2.4.9.4-9.module_el8.10.0+4297+63ae3533

Event History

Oct 29, 2026

Advisory Published

via OSV·12:00 AM

Data Sourced

via OSV·12:00 AM

DescriptionAffected Software

Frequently Asked Questions

Which deployments are most likely exposed to this issue?

Deployments using mod_auth_openidc with the cjose library are relevant, particularly where JWE encryption using AES-CBC-HMAC is in use. The listed affected software includes cjose, cjose-devel, and mod_auth_openidc for AlmaLinux.

What cryptographic condition is involved?

The issue concerns JWE encryption with AES-CBC-HMAC, where cjose uses an all-zero Content Encryption Key. The provided information does not state which configurations enable or invoke this encryption mode.

How can administrators determine whether their systems need the update?

Administrators should identify AlmaLinux systems with cjose, cjose-devel, or mod_auth_openidc installed and compare their installed packages against the ALSA-2026:92157 security update. The advisory identifies CVE-2026-53939 as the addressed issue.

ALSA-2026:92157: Critical: mod_auth_openidc:2.3 security update

Affected Software

Remediation

Event History

Frequently Asked Questions

Which deployments are most likely exposed to this issue?

What cryptographic condition is involved?

How can administrators determine whether their systems need the update?

Company

Resources

Contact

Frequently Asked Questions

Which deployments are most likely exposed to this issue?

What cryptographic condition is involved?

How can administrators determine whether their systems need the update?