What is CVE-2026-73636?

CVE-2026-73636 is a high-severity vulnerability in Apache Software Foundation HTTP Server, classified under Authentication Bypass by Capture-replay. CVSS score: 8.1/10. Published 2026-10-01.

How severe is CVE-2026-73636?

High severity. CVSS v3 base score is 8.1 out of 10.

Vulnerability in Apache Software Foundation HTTP Server

CVE-2026-73636

Authentication bypass by capture-replay in mod_auth_digest in Apache Software Foundation Apache HTTP Server 2.4.x on all platforms allows a man-in-the-middle (MITM) attacker to replay captured digest authentication credentials via crafted requests that trigger garbage collection of the client's shared memory entry when AuthDigestNonceLifetime is set to 0. Users are recommended to upgrade to version 2.4.69, which fixes this issue.

Published 2026-10-01 · last modified 2026-10-01.

CVSS v3 metric

CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Apache Software Foundation HTTP Server

Weakness classification (CWE)

CWE-294 — Authentication Bypass by Capture-replay

References

httpd.apache.org/security/vulnerabilities_24.html (vendor-advisory)
af854a3a-2127-422b-91ae-364da2661108

Frequently asked questions

What is CVE-2026-73636?: CVE-2026-73636 is a high-severity vulnerability in Apache Software Foundation HTTP Server, classified under Authentication Bypass by Capture-replay. CVSS score: 8.1/10. Published 2026-10-01.
How severe is CVE-2026-73636?: High severity. CVSS v3 base score is 8.1 out of 10.