CVE-2026-42535: A path handling issue in mod_dav_fs in Apache 2.4.67 and earlier allows a WebDAV content author to directly ma

Q: How do I fix CVE-2026-42535?

http server: upgrade to 2.4.68. Exact commands for each OS are on this page.

Q: Is CVE-2026-42535 being exploited?

CVE-2026-42535 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-42535 affect?

CVE-2026-42535 affects http server. Severity is critical (CVSS 9.1). A path handling issue in mod_dav_fs in Apache 2.4.67 and earlier allows a WebDAV content author to directly manipulate trusted DAV property databases, potentially causing child process crashes. Users are recommended to upgrade to version 2

Q: How urgent is CVE-2026-42535?

Priority 53/100. Critical severity; Remotely exploitable, no login, no user action; On your watchlist

This month

CRITICAL 9.1REMOTEWATCHLISTUPGRADE

CVE-2026-42535 is a critical-severity flaw (CVSS 9.1) affecting http server. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A path handling issue in mod_dav_fs in Apache 2.4.67 and earlier allows a WebDAV content author to directly manipulate trusted DAV property databases, potentially causing child process crashes. Users are recommended to upgrade to version 2.4.68, which fixes this issue.

Why this priority

Critical severity
Remotely exploitable, no login, no user action
On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	9.1 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.5% (top 55%)
CISA exploited list	No
Weakness	CWE-668
Published	2026-06-08
Last modified	2026-07-23

Publisher (CNA): Apache Software Foundation · Vendor: apache

Last updated 2026-07-23 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-06-08 16:16 UTCPublished CVE record published
2026-07-23 07:10 UTCUpdated Record last modified

apache http server UPGRADE

Affected: < 2.4.68

Fixed in: 2.4.68

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy http-server || rpm -q http-server || http-server --version

2. UPGRADE to 2.4.68 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade http-server

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade http-server

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-42535?

http server: upgrade to 2.4.68. Exact commands for each OS are on this page.

Is CVE-2026-42535 being exploited?

CVE-2026-42535 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-42535 affect?

CVE-2026-42535 affects http server. Severity is critical (CVSS 9.1). A path handling issue in mod_dav_fs in Apache 2.4.67 and earlier allows a WebDAV content author to directly manipulate trusted DAV property databases, potentially causing child process crashes. Users are recommended to upgrade to version 2

How urgent is CVE-2026-42535?

Priority 53/100. Critical severity; Remotely exploitable, no login, no user action; On your watchlist

Software pages

Apache HTTP Server vulnerabilities

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References

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