Important: mod_auth_openidc security update

{
  "id": "b4c89c2b4394db64d3836b37a27610f019c882c374cca2a85debeb2b6d4b9e0c",
  "url": "https://osv.dev/vulnerability/ALSA-2026%3A75581",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Important: mod_auth_openidc security update",
    "summary": "The mod_auth_openidc 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): * mod_auth_openidc: mod_auth_openidc: Denial of Service via malformed state cookie parsing (CVE-2026-54789) 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.",
    "evidence": "osv:ALSA-2026:75581",
    "products": [
      {
        "name": {
          "value": "mod_auth_openidc",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "2.4.16.11-1.el10_2.1",
            "evidence": "/affected/0/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "ALSA-2026:75581",
      "aliases": [
        "ALSA-2026:75581"
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "2.4.16.11-1.el10_2.1"
                }
              ]
            }
          ],
          "package": {
            "name": "mod_auth_openidc",
            "purl": "pkg:rpm/almalinux/mod_auth_openidc",
            "ecosystem": "AlmaLinux:10"
          },
          "database_specific": {
            "source": "https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux10/ALSA-2026:75581.json"
          }
        }
      ],
      "modified": "2026-10-06T13:45:02.550414490Z",
      "provider": "osv",
      "references": [
        "https://access.redhat.com/errata/RHSA-2026:75581",
        "https://access.redhat.com/security/cve/CVE-2026-54789",
        "https://bugzilla.redhat.com/2521051",
        "https://errata.almalinux.org/10/ALSA-2026-75581.html"
      ]
    },
    "related_cves": [],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 89065,
  "published_at": "2026-10-05T00:00:00+00:00"
}