CVE catalog
CVE-2025-3891
libapache2-mod-auth-openidc: CVE-2025-3891
- Severity
- High · CVSS 7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 1.58% · Oct 25, 2026
A flaw was found in the mod_auth_openidc module for Apache httpd. This flaw allows a remote, unauthenticated attacker to trigger a denial of service by sending an empty POST request when the OIDCPreservePost directive is enabled. The server crashes consistently, affecting availability.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | libapache2-mod-auth-openidc | sid | 2.4.20.3-1 | fixed |
| Debian | libapache2-mod-auth-openidc | forky | 2.4.20.3-1 | fixed |
| Debian | libapache2-mod-auth-openidc | trixie | 2.4.17-1 | fixed |
| Debian | libapache2-mod-auth-openidc | trixie-security | 2.4.17-1+deb13u1 | fixed |
| Debian | libapache2-mod-auth-openidc | bookworm | 2.4.12.3-2+deb12u4 | fixed |
| Debian | libapache2-mod-auth-openidc | bookworm-security | 2.4.12.3-2+deb12u5 | fixed |
| Suse | apache2-mod_auth_openidc | linux enterprise high performance computing 15 sp3-ltss | 2.3.8-150100.3.34.1 | fixed |
| Suse | apache2-mod_auth_openidc | linux enterprise high performance computing 15 sp4-espos | 2.3.8-150100.3.34.1 | fixed |
| Suse | apache2-mod_auth_openidc | linux enterprise high performance computing 15 sp4-ltss | 2.3.8-150100.3.34.1 | fixed |
| Suse | apache2-mod_auth_openidc | linux enterprise high performance computing 15 sp5-espos | 2.3.8-150100.3.34.1 | fixed |
| Suse | apache2-mod_auth_openidc | linux enterprise high performance computing 15 sp5-ltss | 2.3.8-150100.3.34.1 | fixed |
| Suse | apache2-mod_auth_openidc | linux enterprise server 15 sp3-ltss | 2.3.8-150100.3.34.1 | fixed |
| Suse | apache2-mod_auth_openidc | linux enterprise server 15 sp4-ltss | 2.3.8-150100.3.34.1 | fixed |
| Suse | apache2-mod_auth_openidc | linux enterprise server 15 sp5-ltss | 2.3.8-150100.3.34.1 | fixed |
| Suse | apache2-mod_auth_openidc | linux enterprise server for sap applications 15 sp3 | 2.3.8-150100.3.34.1 | fixed |
| Suse | apache2-mod_auth_openidc | linux enterprise server for sap applications 15 sp4 | 2.3.8-150100.3.34.1 | fixed |
| Suse | apache2-mod_auth_openidc | linux enterprise server for sap applications 15 sp5 | 2.3.8-150100.3.34.1 | fixed |
| Suse | apache2-mod_auth_openidc | manager proxy 4.3 | 2.3.8-150100.3.34.1 | fixed |
| Suse | apache2-mod_auth_openidc | manager server 4.3 | 2.3.8-150100.3.34.1 | fixed |
| Suse | apache2-mod_auth_openidc | enterprise storage 7.1 | 2.3.8-150100.3.34.1 | fixed |
| Suse | apache2-mod_auth_openidc | linux enterprise module for server applications 15 sp6 | 2.3.8-150600.16.11.1 | fixed |
| Suse | apache2-mod_auth_openidc | linux enterprise module for server applications 15 sp7 | 2.3.8-150600.16.11.1 | fixed |
| Opensuse | apache2-mod_auth_openidc | leap 15.6 | 2.3.8-150600.16.11.1 | fixed |
| Suse | apache2-mod_auth_openidc | linux enterprise server 12 sp5-ltss | 2.4.0-7.22.1 | fixed |
| Suse | apache2-mod_auth_openidc | linux enterprise server ltss extended security 12 sp5 | 2.4.0-7.22.1 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | libapache2-mod-auth-openidc | source | sid | 2.4.14.2-1 | not yet assigned | Not reported | [1104484] |
| Debian | libapache2-mod-auth-openidc | source | forky | 2.4.14.2-1 | not yet assigned | Not reported | [1104484] |
| Debian | libapache2-mod-auth-openidc | source | trixie | 2.4.14.2-1 | not yet assigned | Not reported | [1104484] |
| Debian | libapache2-mod-auth-openidc | source | bookworm | 2.4.12.3-2+deb12u4 | not yet assigned | Not reported | [1104484] |
| Suse | apache2-mod_auth_openidc | rpm | linux enterprise high performance computing 15 sp3-ltss | 2.3.8-150100.3.34.1 | Not reported | SUSE-SU-2025:01962-1 | Not reported |
| Suse | apache2-mod_auth_openidc | rpm | linux enterprise high performance computing 15 sp4-espos | 2.3.8-150100.3.34.1 | Not reported | SUSE-SU-2025:01962-1 | Not reported |
| Suse | apache2-mod_auth_openidc | rpm | linux enterprise high performance computing 15 sp4-ltss | 2.3.8-150100.3.34.1 | Not reported | SUSE-SU-2025:01962-1 | Not reported |
| Suse | apache2-mod_auth_openidc | rpm | linux enterprise high performance computing 15 sp5-espos | 2.3.8-150100.3.34.1 | Not reported | SUSE-SU-2025:01962-1 | Not reported |
| Suse | apache2-mod_auth_openidc | rpm | linux enterprise high performance computing 15 sp5-ltss | 2.3.8-150100.3.34.1 | Not reported | SUSE-SU-2025:01962-1 | Not reported |
| Suse | apache2-mod_auth_openidc | rpm | linux enterprise server 15 sp3-ltss | 2.3.8-150100.3.34.1 | Not reported | SUSE-SU-2025:01962-1 | Not reported |
| Suse | apache2-mod_auth_openidc | rpm | linux enterprise server 15 sp4-ltss | 2.3.8-150100.3.34.1 | Not reported | SUSE-SU-2025:01962-1 | Not reported |
| Suse | apache2-mod_auth_openidc | rpm | linux enterprise server 15 sp5-ltss | 2.3.8-150100.3.34.1 | Not reported | SUSE-SU-2025:01962-1 | Not reported |
| Suse | apache2-mod_auth_openidc | rpm | linux enterprise server for sap applications 15 sp3 | 2.3.8-150100.3.34.1 | Not reported | SUSE-SU-2025:01962-1 | Not reported |
| Suse | apache2-mod_auth_openidc | rpm | linux enterprise server for sap applications 15 sp4 | 2.3.8-150100.3.34.1 | Not reported | SUSE-SU-2025:01962-1 | Not reported |
| Suse | apache2-mod_auth_openidc | rpm | linux enterprise server for sap applications 15 sp5 | 2.3.8-150100.3.34.1 | Not reported | SUSE-SU-2025:01962-1 | Not reported |
| Suse | apache2-mod_auth_openidc | rpm | manager proxy 4.3 | 2.3.8-150100.3.34.1 | Not reported | SUSE-SU-2025:01962-1 | Not reported |
| Suse | apache2-mod_auth_openidc | rpm | manager server 4.3 | 2.3.8-150100.3.34.1 | Not reported | SUSE-SU-2025:01962-1 | Not reported |
| Suse | apache2-mod_auth_openidc | rpm | enterprise storage 7.1 | 2.3.8-150100.3.34.1 | Not reported | SUSE-SU-2025:01962-1 | Not reported |
| Suse | apache2-mod_auth_openidc | rpm | linux enterprise module for server applications 15 sp6 | 2.3.8-150600.16.11.1 | Not reported | SUSE-SU-2025:01953-1 | Not reported |
| Suse | apache2-mod_auth_openidc | rpm | linux enterprise module for server applications 15 sp7 | 2.3.8-150600.16.11.1 | Not reported | SUSE-SU-2025:01953-1 | Not reported |
| Opensuse | apache2-mod_auth_openidc | rpm | leap 15.6 | 2.3.8-150600.16.11.1 | Not reported | SUSE-SU-2025:01953-1 | Not reported |
| Suse | apache2-mod_auth_openidc | rpm | linux enterprise server 12 sp5-ltss | 2.4.0-7.22.1 | Not reported | SUSE-SU-2025:01585-1 | Not reported |
| Suse | apache2-mod_auth_openidc | rpm | linux enterprise server ltss extended security 12 sp5 | 2.4.0-7.22.1 | Not reported | SUSE-SU-2025:01585-1 | Not reported |
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [libapache2-mod-auth-openidc]Fixed
Details (4)
2.4.12.3-2+deb12u4· amd64 · bookwormFixed · Fixed:
2.4.12.3-2+deb12u4dsa · libapache2-mod-auth-openidc · debian · bookworm; dsa · libapache2-mod-auth-openidc · debian · 12
2.4.12.3-2+deb12u4· arm64 · bookwormFixed · Fixed:
2.4.12.3-2+deb12u4dsa · libapache2-mod-auth-openidc · debian · bookworm; dsa · libapache2-mod-auth-openidc · debian · 12
2.4.12.3-2+deb12u4· amd64 · bookworm-securityFixed · Fixed:
2.4.12.3-2+deb12u4dsa · libapache2-mod-auth-openidc · debian · bookworm; dsa · libapache2-mod-auth-openidc · debian · 12
2.4.12.3-2+deb12u4· arm64 · bookworm-securityFixed · Fixed:
2.4.12.3-2+deb12u4dsa · libapache2-mod-auth-openidc · debian · bookworm; dsa · libapache2-mod-auth-openidc · debian · 12
[Debian 13 (Trixie)]
- [libapache2-mod-auth-openidc]Fixed
Details (3)
2.4.17-1· amd64 · trixieFixed · Fixed:
2.4.14.2-1dsa · libapache2-mod-auth-openidc · debian · 13
2.4.17-1· arm64 · trixieFixed · Fixed:
2.4.14.2-1dsa · libapache2-mod-auth-openidc · debian · 13
2.4.17-1+deb13u1· amd64 · trixie-securityFixed · Fixed:
2.4.14.2-1dsa · libapache2-mod-auth-openidc · debian · 13
Observed:
References
- [https://ftp.suse.com/pub/projects/security/csaf/rhsa-2025_4597.json]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2025-3891]
- [https://osv.dev/vulnerability/DLA-4155-1]
- [https://osv.dev/vulnerability/DSA-5917-1]
- [https://osv.dev/vulnerability/SUSE-SU-2025:01585-1]
- [https://osv.dev/vulnerability/SUSE-SU-2025:01953-1]
- [https://osv.dev/vulnerability/SUSE-SU-2025:01962-1]
- [https://security-tracker.debian.org/tracker/CVE-2025-3891]
- [https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-3891.json]
- [https://wid.cert-bund.de/.well-known/csaf/white/2025/wid-sec-w-2025-0956.json]
[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]