CVE catalog

CVE-2026-42528

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 v

[CVE catalog]

Severity: Medium · CVSS 4.3CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
Published: Oct 1, 2026, 3:52:51 PM UTC
Updated: Oct 1, 2026, 4:17:43 PM UTC
Source: [NVD] · [CVE record]
EPSS: 0.40% · Oct 25, 2026

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

Vulnerable and fixed packages

Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.

Distribution	Package	Release	Version	Status
Debian	apache2	sid	`2.4.69-1`	fixed
Debian	apache2	forky	`2.4.69-1`	fixed
Debian	apache2	trixie	`2.4.68-1~deb13u1`	vulnerable
Debian	apache2	trixie-security	`2.4.69-1~deb13u1`	fixed
Debian	apache2	bookworm	`2.4.68-1~deb12u1`	vulnerable
Debian	apache2	bookworm-security	`2.4.67-1~deb12u3`	vulnerable
Cpe	http_server	Not reported	`2.4.69`	fixed
Alpine	apache2	3.21	`2.4.69-r0`	fixed
Alpine	apache2	3.22	`2.4.69-r0`	fixed
Alpine	apache2	3.23	`2.4.69-r0`	fixed
Alpine	apache2	3.24	`2.4.69-r0`	fixed

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	apache2	source	sid	`2.4.69-1`	not yet assigned	Not reported	Not reported
Debian	apache2	source	forky	`2.4.69-1`	not yet assigned	Not reported	Not reported
Debian	apache2	source	trixie	`2.4.69-1~deb13u1`	not yet assigned	Not reported	Not reported
Debian	apache2	source	bookworm	`(unfixed)`	not yet assigned	Not reported	Not reported
Cpe	http_server	cpe	Not reported	`2.4.69`	Not reported	NVD-CVE-2026-42528	Not reported
Alpine	apache2	apk	3.21	`2.4.69-r0`	Not reported	ALPINE-CVE-2026-42528	Not reported
Alpine	apache2	apk	3.22	`2.4.69-r0`	Not reported	ALPINE-CVE-2026-42528	Not reported
Alpine	apache2	apk	3.23	`2.4.69-r0`	Not reported	ALPINE-CVE-2026-42528	Not reported
Alpine	apache2	apk	3.24	`2.4.69-r0`	Not reported	ALPINE-CVE-2026-42528	Not reported

OpenFactory catalog packages

[Debian 12 (Bookworm)]

[apache2]Affected
Details (4)
- 2.4.68-1~deb12u1 · amd64 · bookworm
  Affected
  nvd · apache2 · debian · bookworm
- 2.4.68-1~deb12u1 · arm64 · bookworm
  Affected
  nvd · apache2 · debian · bookworm
- 2.4.67-1~deb12u3 · amd64 · bookworm-security
  Affected
  nvd · apache2 · debian · bookworm
- 2.4.67-1~deb12u3 · arm64 · bookworm-security
  Affected
  nvd · apache2 · debian · bookworm
[apache2-bin]Affected
Source package: [apache2]
Details (4)
- 2.4.68-1~deb12u1 · amd64 · bookworm
  Affected
  nvd · apache2 · debian · bookworm
- 2.4.68-1~deb12u1 · arm64 · bookworm
  Affected
  nvd · apache2 · debian · bookworm
- 2.4.67-1~deb12u3 · amd64 · bookworm-security
  Affected
  nvd · apache2 · debian · bookworm
- 2.4.67-1~deb12u3 · arm64 · bookworm-security
  Affected
  nvd · apache2 · debian · bookworm
[apache2-data]Affected
Source package: [apache2]
Details (4)
- 2.4.68-1~deb12u1 · all · bookworm
  Affected
  nvd · apache2 · debian · bookworm
- 2.4.68-1~deb12u1 · all · bookworm
  Affected
  nvd · apache2 · debian · bookworm
- 2.4.67-1~deb12u3 · all · bookworm-security
  Affected
  nvd · apache2 · debian · bookworm
- 2.4.67-1~deb12u3 · all · bookworm-security
  Affected
  nvd · apache2 · debian · bookworm
[apache2-dev]Affected
Source package: [apache2]
Details (4)
- 2.4.68-1~deb12u1 · amd64 · bookworm
  Affected
  nvd · apache2 · debian · bookworm
- 2.4.68-1~deb12u1 · arm64 · bookworm
  Affected
  nvd · apache2 · debian · bookworm
- 2.4.67-1~deb12u3 · amd64 · bookworm-security
  Affected
  nvd · apache2 · debian · bookworm
- 2.4.67-1~deb12u3 · arm64 · bookworm-security
  Affected
  nvd · apache2 · debian · bookworm
[apache2-doc]Affected
Source package: [apache2]
Details (4)
- 2.4.68-1~deb12u1 · all · bookworm
  Affected
  nvd · apache2 · debian · bookworm
- 2.4.68-1~deb12u1 · all · bookworm
  Affected
  nvd · apache2 · debian · bookworm
- 2.4.67-1~deb12u3 · all · bookworm-security
  Affected
  nvd · apache2 · debian · bookworm
- 2.4.67-1~deb12u3 · all · bookworm-security
  Affected
  nvd · apache2 · debian · bookworm
[apache2-ssl-dev]Affected
Source package: [apache2]
Details (4)
- 2.4.68-1~deb12u1 · amd64 · bookworm
  Affected
  nvd · apache2 · debian · bookworm
- 2.4.68-1~deb12u1 · arm64 · bookworm
  Affected
  nvd · apache2 · debian · bookworm
- 2.4.67-1~deb12u3 · amd64 · bookworm-security
  Affected
  nvd · apache2 · debian · bookworm
- 2.4.67-1~deb12u3 · arm64 · bookworm-security
  Affected
  nvd · apache2 · debian · bookworm
[apache2-suexec-custom]Affected
Source package: [apache2]
Details (4)
- 2.4.68-1~deb12u1 · amd64 · bookworm
  Affected
  nvd · apache2 · debian · bookworm
- 2.4.68-1~deb12u1 · arm64 · bookworm
  Affected
  nvd · apache2 · debian · bookworm
- 2.4.67-1~deb12u3 · amd64 · bookworm-security
  Affected
  nvd · apache2 · debian · bookworm
- 2.4.67-1~deb12u3 · arm64 · bookworm-security
  Affected
  nvd · apache2 · debian · bookworm
[apache2-suexec-pristine]Affected
Source package: [apache2]
Details (4)
- 2.4.68-1~deb12u1 · amd64 · bookworm
  Affected
  nvd · apache2 · debian · bookworm
- 2.4.68-1~deb12u1 · arm64 · bookworm
  Affected
  nvd · apache2 · debian · bookworm
- 2.4.67-1~deb12u3 · amd64 · bookworm-security
  Affected
  nvd · apache2 · debian · bookworm
- 2.4.67-1~deb12u3 · arm64 · bookworm-security
  Affected
  nvd · apache2 · debian · bookworm
[apache2-utils]Affected
Source package: [apache2]
Details (4)
- 2.4.68-1~deb12u1 · amd64 · bookworm
  Affected
  nvd · apache2 · debian · bookworm
- 2.4.68-1~deb12u1 · arm64 · bookworm
  Affected
  nvd · apache2 · debian · bookworm
- 2.4.67-1~deb12u3 · amd64 · bookworm-security
  Affected
  nvd · apache2 · debian · bookworm
- 2.4.67-1~deb12u3 · arm64 · bookworm-security
  Affected
  nvd · apache2 · debian · bookworm
[libapache2-mod-md]Affected
Source package: [apache2]
Details (4)
- 2.4.68-1~deb12u1 · amd64 · bookworm
  Affected
  nvd · apache2 · debian · bookworm
- 2.4.68-1~deb12u1 · arm64 · bookworm
  Affected
  nvd · apache2 · debian · bookworm
- 2.4.67-1~deb12u3 · amd64 · bookworm-security
  Affected
  nvd · apache2 · debian · bookworm
- 2.4.67-1~deb12u3 · arm64 · bookworm-security
  Affected
  nvd · apache2 · debian · bookworm
[libapache2-mod-proxy-uwsgi]Affected
Source package: [apache2]
Details (4)
- 2.4.68-1~deb12u1 · amd64 · bookworm
  Affected
  nvd · apache2 · debian · bookworm
- 2.4.68-1~deb12u1 · arm64 · bookworm
  Affected
  nvd · apache2 · debian · bookworm
- 2.4.67-1~deb12u3 · amd64 · bookworm-security
  Affected
  nvd · apache2 · debian · bookworm
- 2.4.67-1~deb12u3 · arm64 · bookworm-security
  Affected
  nvd · apache2 · debian · bookworm

Observed: Oct 27, 2026, 5:00:08 AM UTC

References

[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX]