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TI-2025-40704 Aliases CVE-2025-66200GHSA-3j3g-3pw9-9vcc

Apache HTTP Server: mod_userdir+suexec bypass via AllowOverride FileInfo

Priority LOW 26CWE-288Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Security bypass
Confidentiality · integrity · availability
None · Low · Low
Fix status
Partial Red Hat: 7 fixed, 3 without a fix

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA and Red Hat. Impact type from CWE-288.

Summary

mod_userdir+suexec bypass via AllowOverride FileInfo vulnerability in Apache HTTP Server. Users with access to use the RequestHeader directive in htaccess can cause some CGI scripts to run under an unexpected userid. This issue affects Apache HTTP Server: from 2.4.7 through 2.4.65. Users are recommended to upgrade to version 2.4.66, which fixes the issue.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00697 53rd percentileScored 2026-11-07
Fix Partial Red Hat: 6 advisoriesRed Hat: 7 fixed, 3 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

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 Server2.4.7 – 2.4.65—No fix listedCNA
  • Apache HTTP Server VendorApache Affected 2.4.7 – 2.4.65 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:apache:http_server:*:*:*:*:*:*:*:*2.4.7 to before 2.4.66VulnerableApache
  • cpe:2.3:a:apache:http_server:*:*:*:*:*:*:*:* Versions 2.4.7 to before 2.4.66 Vulnerable ·Apache

Remediation

Red Hat 6 advisories

  • RHSA-2026:5156 Released 2026-03-19 · Red Hat rating Important
    Red Hat Hardened Images RPM Release
    • Red Hat Hardened Images httpd-2.4.66-6.hum1@aarch64, httpd-2.4.66-6.hum1@src, httpd-2.4.66-6.hum1@x86_64 +10
  • RHSA-2026:2994 Released 2026-02-23 · Red Hat rating Important
    Red Hat JBoss Core Services Apache HTTP Server 2.4.62 SP3 security update
    • Red Hat JBoss Core Services on RHEL 7 Server jbcs-httpd24-apr-util-1.6.3-4.el7jbcs, jbcs-httpd24-apr-util-devel-1.6.3-4.el7jbcs, jbcs-httpd24-apr-util-ldap-1.6.3-4.el7jbcs +31
    • Red Hat JBoss Core Services on RHEL 8 jbcs-httpd24-apr-util-1.6.3-4.el8jbcs, jbcs-httpd24-apr-util-devel-1.6.3-4.el8jbcs, jbcs-httpd24-apr-util-ldap-1.6.3-4.el8jbcs +21
  • RHSA-2026:2995 Released 2026-02-23 · Red Hat rating Important
    Red Hat JBoss Core Services Apache HTTP Server 2.4.62 SP3 security update
    • Red Hat JBoss Core Services 2.4.62.SP3
Show 3 more Red Hat advisories
  • RHSA-2025:23919 Released 2025-12-22 · Red Hat rating Important
    httpd security update
    • Red Hat Enterprise Linux AppStream (v. 9) httpd-2.4.62-7.el9_7.3, httpd-core-2.4.62-7.el9_7.3, httpd-devel-2.4.62-7.el9_7.3 +8
  • RHSA-2025:23932 Released 2025-12-22 · Red Hat rating Important
    httpd security update
    • Red Hat Enterprise Linux AppStream (v. 10) httpd-2.4.63-4.el10_1.3, httpd-core-2.4.63-4.el10_1.3, httpd-devel-2.4.63-4.el10_1.3 +8
  • RHSA-2025:23732 Released 2025-12-22 · Red Hat rating Important
    httpd:2.4 security update
    • Red Hat Enterprise Linux AppStream (v. 8) httpd-2.4.37-65.module+el8.10.0+23815+1b5e1c66.7.aarch64::httpd:2.4, httpd-2.4.37-65.module+el8.10.0+23815+1b5e1c66.7.ppc64le::httpd:2.4, httpd-2.4.37-65.module+el8.10.0+23815+1b5e1c66.7.s390x::httpd:2.4 +38

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 planned: Out of support scope
Red Hat JBoss Core ServicesAffectedNo fix yet
Red Hat Enterprise Linux AppStream (v. 10)Fixed RHSA-2025:23932
Red Hat Enterprise Linux AppStream (v. 8)Fixed RHSA-2025:23732
Red Hat Enterprise Linux AppStream (v. 9)Fixed RHSA-2025:23919
Red Hat Hardened ImagesFixed RHSA-2026:5156
Red Hat JBoss Core Services 2.4.62.SP3Fixed RHSA-2026:2995
Red Hat JBoss Core Services on RHEL 7 ServerFixed RHSA-2026:2994
Red Hat JBoss Core Services on RHEL 8Fixed RHSA-2026:2994
Not affected: 3 products
  • Red Hat Hardened Images
  • Red Hat JBoss Core Services on RHEL 7 Server
  • Red Hat JBoss Core Services on RHEL 8

Timeline

  1. 2026-10-02 Threatist record created from CVE-2025-66200
  2. 2026-10-03 Alias added: GHSA-3j3g-3pw9-9vcc
  3. 2026-10-09 Fix available: RHSA-2026:2995 · Red Hat
  4. 2026-10-16 EPSS moved to the 50th–90th percentile
  5. 2026-10-16 Fix available: Red Hat JBoss Core Services 2.4.62.SP3 · 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