CVE-2026-42528

Apache HTTP Server: mod_dav shared lock overflow

At a glance

Severity: MEDIUM 4.3
EPSS: EPSS 0.40 % · percentile 34 (2026-10-27)
State: PUBLISHED
Published: 2026-10-01
Updated: 2026-10-01
Assigner: apache
NVD status: Analyzed

Description

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

Scores

Version	Score	Vector	Scored by
CVSS 3.1	MEDIUM 4.3	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L	CISA-ADP
CVSS 3.1	MEDIUM 4.3	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L	NVD · 134c704f-9b21-4f2e-91b3-4a467353bcc0 (Secondary)

Weaknesses (CWE)

CWE-789

European references

ENISA EUVD · EUVD-2026-90885
GCVE · GCVE-0-2026-42528

CERT-FR advisories

CERTFR-2026-AVI-1248 — Multiples vulnérabilités dans Apache HTTP Server · cert.ssi.gouv.fr

Affected configurations (NVD CPE)

cpe:2.3:a:apache:http_server:*:*:*:*:*:*:*:* ≥ 2.4.0 < 2.4.69

Affected products

Product	Versions
Apache Software Foundation · Apache HTTP Server	affected 0 ≤ 2.4.68

References

Sources

Source	Licence
CVE List (CVEProject cvelistV5)	CVE Program Terms of Use
EPSS (FIRST.org)	FIRST — attribution requested
ENISA EUVD	ENISA — reproduction authorised, source acknowledged
CERT-FR (ANSSI)	Licence Ouverte / Etalab 2.0
NVD (NIST) via fkie-cad/nvd-json-data-feeds	Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD