CVE-2026-42528

🔶 medium

Summary

A memory calculation bug in mod_dav in Apache httpd 2.4.67 and earlier allows an attacker with permission to create WebDAV locks to crash server child processes. Users are recommended to upgrade to version 2.4.69, which fixes this issue

CVSS Score

4.3

Medium

EPSS Score

0.4

Exploit Probability

Published Date

2026-10-01

First Seen: 2026-10-04

📊 Relative Risk Intelligence

This CVE is Lower Risk - more severe than 5.3% of all 365,863 vulnerabilities in our database.

#346,327

Below average severity

Severity Percentile

🎯 CISA SSVC Assessment Updated: Oct 1, 2026

🔍 Exploitation Status

None

No known exploits

⚙️ Automatable

Requires human interaction

💥 Technical Impact

Partial

Limited system impact

🏆 Discovered By

Zhenpeng (Leo) Lin at depthfirst

SSVC data provided by CISA

Last Modified 2026-10-06

Source NVD 🔗

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

CWE IDs (Weakness Types)

CWE-789

📦 Affected Products 2

Vendor	Product	Status	Affected Versions
apache	http_server	Affected	> 2.4.0 < 2.4.69
apache	http_server	Affected	> 2.4.60 < 2.4.69

🔗 References 2

https://httpd.apache.org/security/vulnerabilities_24...

Vendor Advisory

http://www.openwall.com/lists/oss-security/2026/10/0...

Mailing List Third Party Advisory

🔗 Related CVEs 6

CVE ID	Severity	CVSS	EPSS	Summary	Published
CVE-2026-42356	ℹ️ low	3.7	0.5	Deployment of wrong handler vulnerability in Apache HTTP Server allows the target of some internal redirects from CGI pr...	2026-10-01
CVE-2026-46729	⚠️ high	7.5	0.5	NULL Pointer Dereference vulnerability in Apache HTTP Servers mod_heartmonitor over unicast listener. This issue affe...	2026-10-01
CVE-2026-47360	⚠️ high	7.5	0.4	Exposure of Sensitive Information to an Unauthorized Actor vulnerability in Apache HTTP Server's mod_session_cookie modu...	2026-10-01
CVE-2026-48005	⚠️ high	7.5	0.6	Missing authentication checks in mod_auth_digest in Apache Software Foundation Apache HTTP Server before 2.4.69 on all p...	2026-10-01
CVE-2026-56153	⚠️ high	7.5	0.5	Out-of-bounds Write vulnerability in Apache HTTP Server's mod_charset_lite. This issue affects Apache HTTP Server: fr...	2026-10-01
CVE-2026-56154	⛔ critical	9.8	0.6	Use After Free vulnerability in Apache HTTP Server's mod_rewrite when using lookahead (%{LA-U:HTTP:...}) This issue a...	2026-10-01

These CVEs affect the same products