CVE-2025-3891
Mod_auth_openidc: dos via empty post in mod_auth_openidc with oidcpreservepost enabled
CVSS Score
7.5
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-248 |
| Published | Apr 29, 2025 |
| Last Updated | Nov 11, 2025 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
Affected Versions
Red Hat / Red Hat Enterprise Linux 8
All versions affected Red Hat / Red Hat Enterprise Linux 8.2 Advanced Update Support
All versions affected Red Hat / Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support
All versions affected Red Hat / Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support
All versions affected Red Hat / Red Hat Enterprise Linux 8.6 Telecommunications Update Service
All versions affected Red Hat / Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions
All versions affected Red Hat / Red Hat Enterprise Linux 8.8 Telecommunications Update Service
All versions affected Red Hat / Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions
All versions affected Red Hat / Red Hat Enterprise Linux 9
All versions affected Red Hat / Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions
All versions affected Red Hat / Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions
All versions affected Red Hat / Red Hat Enterprise Linux 9.4 Extended Update Support
All versions affected Red Hat / Red Hat Enterprise Linux 10
All versions affected Red Hat / Red Hat Enterprise Linux 7
All versions affected References
access.redhat.com: https://access.redhat.com/errata/RHSA-2025:10002 access.redhat.com: https://access.redhat.com/errata/RHSA-2025:10003 access.redhat.com: https://access.redhat.com/errata/RHSA-2025:10004 access.redhat.com: https://access.redhat.com/errata/RHSA-2025:10006 access.redhat.com: https://access.redhat.com/errata/RHSA-2025:10007 access.redhat.com: https://access.redhat.com/errata/RHSA-2025:10008 access.redhat.com: https://access.redhat.com/errata/RHSA-2025:10010 access.redhat.com: https://access.redhat.com/errata/RHSA-2025:4597 access.redhat.com: https://access.redhat.com/errata/RHSA-2025:9396 access.redhat.com: https://access.redhat.com/security/cve/CVE-2025-3891 bugzilla.redhat.com: https://bugzilla.redhat.com/show_bug.cgi?id=2361633 github.com: https://github.com/OpenIDC/mod_auth_openidc/commit/6a0b5f66c87184dfe0e4400f6bdd46a82dc0ec2b github.com: https://github.com/OpenIDC/mod_auth_openidc/security/advisories/GHSA-x7cf-8wgv-5j86 lists.debian.org: https://lists.debian.org/debian-lts-announce/2025/05/msg00007.html