CVE-2026-93546

Apache HTTP Server: mod_dav_fs namespace overflow

At a glance

Severity: HIGH 8.8
EPSS: EPSS 0.43 % · percentile 37 (2026-10-27)
State: PUBLISHED
Published: 2026-10-01
Updated: 2026-10-01
Assigner: apache
NVD status: Analyzed

Description

Integer overflow in mod_dav_fs in Apache HTTP Server through 2.4.68 allows an authenticated WebDAV client with write access to crash worker processes and persistently corrupt a directory's property database via PROPPATCH requests declaring many XML namespaces.

Scores

Version	Score	Vector	Scored by
CVSS 3.1	HIGH 8.8	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H	CISA-ADP
CVSS 3.1	HIGH 8.8	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H	NVD · 134c704f-9b21-4f2e-91b3-4a467353bcc0 (Secondary)

Weaknesses (CWE)

CWE-190

European references

ENISA EUVD · EUVD-2026-90910
GCVE · GCVE-0-2026-93546

CERT-FR advisories

CERTFR-2026-AVI-1376 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
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:*:*:*:*:*:*:*:* < 2.4.69

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