Vulnary
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Critical· 9.1official fix available

CVE-2026-42535

CVE-2026-42535 is a critical vulnerability in Apache 2.4.67 and earlier where improper path handling in mod_dav_fs allows WebDAV content authors to manipulate trusted DAV property databases, risking child process crashes. Upgrading to Apache 2.4.68 or later is the recommended fix.

publishedJun 8, 2026
last modifiedJul 23, 2026
sourcesNVD
severity · cvss
9.1
critical · how bad it is
exploitation · epss
<1%
42th percentile · chance of exploitation in 30 days
(ai-assisted) A model wrote this summary from the official data, so double-check it against the source before you act on it. Read the official advisory →
auto-deletes from the system
counting…on Aug 23, 2026

An official fix is available, so this entry is kept for 30 days and then removed automatically.

01

Who is affected

Apache http_server (versions 2.4.67 and earlier)

02

Real-world impact

WebDAV content authors could exploit this to cause server crashes, potentially disrupting services.

03

Why this severity

CVSS 9.1 (critical): High impact on integrity and availability due to potential service disruption from crashes.

04

What to do about it

official fix available
recommended steps
  1. 01Upgrade Apache to version 2.4.68 or later to apply the vendor-provided patch.

NVD-referenced vendor advisory

05

Timeline

  1. Jun 8, 2026 · Jun 8, 2026
    Published
    Disclosed and added to the National Vulnerability Database.
  2. Jul 23, 2026 · 12d ago
    Advisory updated
    The NVD record was last revised.
  3. Jul 24, 2026 · 11d ago
    Official fix available
    A vendor patch or mitigation now exists — see the remediation steps above.
06

How it’s attacked

Attack vectorNetwork (remote)
Attack complexityLow
Privileges requiredNone
User interactionNone needed
ScopeUnchanged
Confidentiality impactNone
Integrity impactHigh
Availability impactHigh
07

References & advisories

NVD advisory ↗Search advisories ↗
(ai-assisted) A model wrote this summary from the official data, so double-check it against the source before you act on it. Read the official advisory →
CVE-2026-42535: CVE-2026-42535 is a critical vulnerability in Apache 2.4.67 and earlie · Vulnary