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PatchSiren cyber security CVE debrief

CVE-2026-42535 Apache CVE debrief

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.

Vendor
Apache
Product
HTTP Server
CVSS
CRITICAL 9.1
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-08
Original CVE updated
2026-07-23
Advisory published
2026-06-08
Advisory updated
2026-07-23

Who should care

Users of Apache HTTP Server versions 2.4.67 and earlier should upgrade to version 2.4.68 to fix this issue.

Technical summary

The issue is caused by a path handling vulnerability in mod_dav_fs, which allows a WebDAV content author to directly manipulate trusted DAV property databases. This can potentially cause child process crashes.

Defensive priority

high

Recommended defensive actions

  • Upgrade to Apache HTTP Server version 2.4.68 or later.

Evidence notes

The CVE-2026-42535 record was published on [cve-org](https://www.cve.org/CVERecord?id=CVE-2026-42535).

Sources and references

Verified primary and authoritative sources

  • CVE-2026-42535 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-42535

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-42535 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-42535

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.