← Vulnerability feed

Vulnerability record · CVE-2026-73636 · published 1 October 2026

CVE-2026-73636: Apache http server authentication bypass by capture-replay vulnerability

Apache · Http Server

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.

8.1 CVSS 3.1 High EPSS 0.40% · top 65.5% CWE-294 · Authentication bypass by capture-replay
8.1CVSS 3.1 base score
0.40%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
2References
5 Oct 2026Last modified by NVD

Description

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.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://httpd.apache.org/security/vulnerabilities_24.html Vendor Advisory
http://www.openwall.com/lists/oss-security/2026/10/01/27 Mailing ListThird Party Advisory

Track CVE-2026-73636 inside VULONE

Watch it alongside the ransomware crews, C2 infrastructure and forum chatter that reference it, query it through the API and pull it into your SIEM over TAXII.

Start free Open in platform

Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2021-42013Apache HTTP Server path traversal and RCE via incomplete fixThe fix for CVE-2021-41773 in Apache HTTP Server 2.4.50 was insufficient, leaving a path traversal flaw that lets attackers map URLs to files outside…KEVEPSS 100%analysed9.8CVE-2021-41773Apache HTTP Server 2.4.49 path traversal and RCEA path normalization flaw introduced in Apache HTTP Server 2.4.49 lets attackers map URLs to files outside directories configured by Alias-like direc…KEVEPSS 100%analysed9.1CVE-2024-38475Apache HTTP Server mod_rewrite improper escaping enables code executionApache HTTP Server 2.4.59 and earlier has an improper output escaping flaw in mod_rewrite. Substitutions in server context that use a backreference o…KEVEPSS 100%analysed9.0CVE-2021-40438Apache HTTP Server mod_proxy SSRF via crafted URI pathA crafted request URI path can make mod_proxy forward the request to an origin server chosen by the remote user, an SSRF flaw in Apache HTTP Server 2…KEVEPSS 100%analysed7.8CVE-2019-0211Apache HTTP Server scoreboard use-after-free local privilege escalationApache HTTP Server 2.4.17 through 2.4.38 with MPM event, worker or prefork contains a use-after-free in scoreboard handling. Code running in a less-p…KEVEPSS 65%analysed10.0CVE-2010-0425Apache mod_isapi on Windows remote code execution via orphaned callbacksmod_isapi in Apache HTTP Server on Windows does not ensure request processing is complete before calling isapi_unload for an ISAPI .dll module, leavi…EPSS 94%analysed10.0CVE-2005-2700Apache http server vulnerabilityssl_engine_kernel.c in mod_ssl before 2.8.24, when using "SSLVerifyClient optional" in the global virtual host configuration, does not properly enfor…EPSS 31%10.0CVE-2004-0492Apache http server vulnerabilityHeap-based buffer overflow in proxy_util.c for mod_proxy in Apache 1.3.25 to 1.3.31 allows remote attackers to cause a denial of service (process cra…EPSS 34%

Source: NIST National Vulnerability Database (record CVE-2026-73636), CISA KEV, FIRST EPSS (scores of 2026-11-14). This page is refreshed as NVD updates the record.