What’s Vulnerable › Vulnerabilities

CVE-2026-93546: Apache HTTP Server: mod_dav_fs namespace overflow

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-01 · updated 2026-10-05
• Weakness: CWE-190

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.

Affected products

• Apache HTTP Server: before 2.4.69 — fixed in 2.4.69

How to fix

Upgrade to a fixed version: Apache HTTP Server 2.4.69. Check the vendor advisory for mitigations.

References

• https://httpd.apache.org/security/vulnerabilities_24.html
• http://www.openwall.com/lists/oss-security/2026/10/01/30

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