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TI-2026-63026 Aliases CVE-2026-93546GHSA-x37v-wq26-vjw7

Apache HTTP Server: mod_dav_fs namespace overflow

Priority MEDIUM 40CWE-190Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Partial Red Hat: 4 fixed, 3 without a fix

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA and Red Hat. Impact type from CWE-190 and the CVSS impact.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00429 37th percentileScored 2026-11-07
Fix Partial Red Hat: 4 advisoriesRed Hat: 4 fixed, 3 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
ApacheApache HTTP Serverup to 2.4.68—No fix listedCNA
  • Apache HTTP Server VendorApache Affected up to 2.4.68 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:apache:http_server:*:*:*:*:*:*:*:*before 2.4.69VulnerableApache
  • cpe:2.3:a:apache:http_server:*:*:*:*:*:*:*:* Versions before 2.4.69 Vulnerable ·Apache

Remediation

Red Hat 4 advisories

  • RHSA-2026:92616 Released 2026-10-29 · Red Hat rating Important
    httpd:2.4 security, bug fix, and enhancement update
    • Red Hat Enterprise Linux AppStream (v. 8) httpd-2.4.37-65.module+el8.10.0+25092+6f3ea0dd.13.aarch64::httpd:2.4, httpd-2.4.37-65.module+el8.10.0+25092+6f3ea0dd.13.ppc64le::httpd:2.4, httpd-2.4.37-65.module+el8.10.0+25092+6f3ea0dd.13.s390x::httpd:2.4 +38
  • RHSA-2026:89860 Released 2026-10-26 · Red Hat rating Important
    httpd security update
    • Red Hat Enterprise Linux AppStream (v. 10) httpd-2.4.63-13.el10_2.8, httpd-core-2.4.63-13.el10_2.8, httpd-devel-2.4.63-13.el10_2.8 +8
  • RHSA-2026:88229 Released 2026-10-22 · Red Hat rating Important
    httpd security update
    • Red Hat Enterprise Linux AppStream (v. 9) httpd-2.4.62-13.el9_8.9, httpd-core-2.4.62-13.el9_8.9, httpd-devel-2.4.62-13.el9_8.9 +8
Show 1 more Red Hat advisories
  • RHSA-2026:74858 Released 2026-10-02 · Red Hat rating Important
    Red Hat Hardened Images RPMs bug fix and enhancement update
    • Red Hat Hardened Images httpd-2.4.69-1.hum1@aarch64, httpd-2.4.69-1.hum1@src, httpd-2.4.69-1.hum1@x86_64 +20

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux 6AffectedNo fix planned: Out of support scope
Red Hat Enterprise Linux 7AffectedNo fix yet
Red Hat JBoss Core ServicesAffectedNo fix yet: Fix deferred
Red Hat Enterprise Linux AppStream (v. 10)Fixed RHSA-2026:89860
Red Hat Enterprise Linux AppStream (v. 8)Fixed RHSA-2026:92616
Red Hat Enterprise Linux AppStream (v. 9)Fixed RHSA-2026:88229
Red Hat Hardened ImagesFixed RHSA-2026:74858

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-93546
  2. 2026-10-03 Alias added: GHSA-x37v-wq26-vjw7
  3. 2026-10-07 Affected versions changed · Red Hat
  4. 2026-10-23 Fix available: RHSA-2026:88229 · Red Hat
  5. 2026-10-23 Fix available: Red Hat Enterprise Linux AppStream (v. 9) · Red Hat
  6. 2026-10-26 Fix available: RHSA-2026:89860 · Red Hat
  7. 2026-10-26 Fix available: Red Hat Enterprise Linux AppStream (v. 10) · Red Hat
  8. 2026-10-30 Fix available: RHSA-2026:92616 · Red Hat
  9. 2026-10-30 Fix available: Red Hat Enterprise Linux AppStream (v. 8) · Red Hat

References

Advisory 2

  • TI-2021-18535 Path Traversal and Remote Code Execution in Apache HTTP Server 2.4.49 and 2.4.50 (incomplete fix of CVE-2021-41773) KEVCVSS 3.1CRITICAL 9.8
  • TI-2021-18417 Path traversal and file disclosure vulnerability in Apache HTTP Server 2.4.49 KEVCVSS 3.1CRITICAL 9.8
  • TI-2024-25716 Apache HTTP Server weakness in mod_rewrite when first segment of substitution matches filesystem path. KEVCVSS 3.1CRITICAL 9.1
  • TI-2021-17490 mod_proxy SSRF KEVCVSS 3.1CRITICAL 9.0
  • TI-2019-00184 Use after free in Apache HTTP Server KEVCVSS 3.1HIGH 7.8
  • TI-2009-03392 The TLS protocol, and the SSL protocol 3.0 and possibly earlier, as used in Microsoft… CVSS 3.1CRITICAL 9.8
See all 349 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences