Home / mailings [SECURITY] [DSA 6504-1] libapache2-mod-auth-openidc security update
Posted on 17 September 2026
Debian Security Advisory- -------------------------------------------------------------------------
Debian Security Advisory DSA-6504-1 security@debian.org
https://www.debian.org/security/ Moritz Muehlenhoff
September 17, 2026 https://www.debian.org/security/faq
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Package : libapache2-mod-auth-openidc
CVE ID : CVE-2026-54789
It was discovered that incorrect state cookie parsing in
mod_auth_openidc, an OpenID Certified authentication and authorisation
module for the Apache HTTP server that implements the OpenID Connect
Relying Party functionality, could result in denial of service.
For the stable distribution (trixie), this problem has been fixed in
version 2.4.17-1+deb13u1.
We recommend that you upgrade your libapache2-mod-auth-openidc packages.
For the detailed security status of libapache2-mod-auth-openidc please refer to
its security tracker page at:
https://security-tracker.debian.org/tracker/libapache2-mod-auth-openidc
Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://www.debian.org/security/
Mailing list: debian-security-announce@lists.debian.org
