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Vulnerabilities

Vulnerability · CVE-2026-93546

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 dir

Published Oct 1, 2026 · catalog updated Oct 16, 2026 · Apache Ubuntu

Check if you run it

No confirmed exploitation is on record for CVE-2026-93546. EPSS is 0.44%. Act only if a listed version of Apache Ubuntu is installed.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
High8.8
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.44%
Remediation
Advisory link
Affected products
Debian:12 apache2 · Debian:13 apache2 · Debian:14 apache2

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.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • Debian:12 apache22.4.57-2, 2.4.57-3, 2.4.58-1
  • Debian:13 apache20 → 2.4.69-1~deb13u1
  • Debian:14 apache20 → 2.4.69-1

How to fix CVE-2026-93546

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-93546. EPSS is 0.44%. Act only if a listed version of Apache Ubuntu is installed.

Which versions are affected?

Compare what you have installed with 2.4.57-2, 2.4.57-3, 2.4.58-1, 0 → 2.4.69-1~deb13u1, 0 → 2.4.69-1. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 0.44%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Technology hubs

Debian securityUbuntu security

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Oct 14, 2026 · Ubuntu Security Notices

    Detected

    이지웅 discovered that Apache HTTP Server exposed WebDAV property information. A remote attacker could possibly use this issue to obtain sensitive information. (CVE-2026-58415) Zhen Kong and Charles Vosburgh discovered that Apache HTTP Server did not properly validate FTP server responses. A remote attacker could possibly use this issue to make a forward proxy connect to an arbitrary host. (CVE-2026-

  2. Oct 16, 2026 · OpenSSF OSV / OSV Scanner

    Fix available

    apache2 fixed in 2.4.69-1~deb13u1; apache2 fixed in 2.4.69-1

  3. Oct 16, 2026 · OpenSSF OSV / OSV Scanner

    Fix available

    apache2 fixed in 2.4.69-1~deb13u1

  4. Oct 16, 2026 · OpenSSF OSV / OSV Scanner

    Fix available

    apache2 fixed in 2.4.69-1

  5. Oct 16, 2026 · OpenSSF OSV / OSV Scanner

    Updated

    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.

Sources

  • Apache Software FoundationVendor advisoryCVE-2026-93546

    CVE-2026-93546 is named on the public Apache Software Foundation page.

    httpd.apache.org
  • CVE.orgVulnerability recordCVE-2026-93546

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-93546

    30-day exploitation probability 0.4%

    first.org
  • OpenSSF OSV / OSV ScannerPackage advisoryDEBIAN-CVE-2026-93546
    osv.dev
  • Trivy Vulnerability DBPackage advisoryDEBIAN-CVE-2026-93546

    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.

    osv.dev
  • Ubuntu Security NoticesVendor advisoryCVE-2026-93546

    이지웅 discovered that Apache HTTP Server exposed WebDAV property information. A remote attacker could possibly use this issue to obtain sensitive information. (CVE-2026-58415) Zhen Kong and Charles Vosburgh discovered that Apache HTTP Server did not properly validate FTP server res

    ubuntu.com

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.