CVE-2025-3891 HIGH

CVE-2025-3891: Mod_auth_openidc: dos via empty post in mod_auth_openidc with oidcpreservepost enabled

Vendor Red Hat
Product Red Hat Enterprise Linux 10
Weakness CWE-248
Published April 29, 2025
Last update November 11, 2025
View on NVD All CVEs

CVSS base score

7.5/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality None
Integrity None

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

April 29, 2025 CVE published
November 11, 2025 Record updated