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Fencer Vulns
low 3.7

CVE-2026-42356 json

Apache HTTP Server: limited RCE for some internal redirects to non-CGI files in CGI directories

published 2026-10-01 38 d ago modified 2026-10-07 32 d ago also BIT-apache-2026-42356 , EUVD-2026-90886

cvss
3.7
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 38%
public exploits
0
none known

Summary

Deployment of wrong handler vulnerability in Apache HTTP Server allows the target of some internal redirects from CGI programs to also be treated as CGI and executed. The target must already be in a directory enabled for CGI and have no other extension understood by mod_mime.

This issue affects Apache HTTP Server: from 2.4.60 through 2.4.68.

Patch / fix

  • bitnami apache 2.4.69
  • apache http_server 2.4.69
  • apache2 Debian 13 2.4.69-1~deb13u1
  • apache2 Debian 14 2.4.69-1

debian advisories DEBIAN-CVE-2026-42356

  • httpd hummingbird 1 2.4.69-1.hum1
  • mod_lua hummingbird 1 2.4.69-1.hum1
  • mod_ssl hummingbird 1 2.4.69-1.hum1
  • mod_ldap hummingbird 1 2.4.69-1.hum1
  • httpd-core hummingbird 1 2.4.69-1.hum1
  • httpd-tools hummingbird 1 2.4.69-1.hum1
  • mod_session hummingbird 1 2.4.69-1.hum1
  • httpd-manual hummingbird 1 2.4.69-1.hum1

red hat advisories RHSA-2026:74858

  • apache2 SLE Module for Basesystem 15 SP7 2.4.66-150700.4.26.1
  • apache2-event SLE Module for Package Hub 15 SP7 2.4.66-150700.4.26.1
  • apache2-utils SLE Module for Server Applications 15 SP7 2.4.66-150700.4.26.1
  • apache2-manual SLE Module for Server Applications 15 SP7 2.4.66-150700.4.26.1
  • apache2-worker SLE Module for Server Applications 15 SP7 2.4.66-150700.4.26.1
  • apache2-prefork SLE Module for Basesystem 15 SP7 2.4.66-150700.4.26.1
  • apache2 SLES for SAP 15 SP5, SLES for SAP 15 SP4, SLES 15 SP5-LTSS +5 more 2.4.66-150400.6.60.1
  • apache2 SLES LTSS Extended Security 12 SP5, SLES 12 SP5-LTSS 2.4.66-35.84.1

suse advisories SUSE-SU-2026:5099-1SUSE-SU-2026:5077-1SUSE-SU-2026:5076-1SUSE-SU-2026:5075-1

  • apache2 Alpine 3.24, Alpine 3.23, Alpine 3.22 +1 more 2.4.69-r0

alpine advisories ALPINE-CVE-2026-42356

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • httpd Azure Linux 3.0 2.4.69-1

azure linux advisories AZL-106752

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-42356 updated cvss 3.7

httpd: httpd: arbitrary code execution via incorrect handler assignment during internal CGI redirects

  • Red Hat Enterprise Linux 9 httpd, mod_lua, mod_ssl, mod_ldap, httpd-core, httpd-tools, +5 more Red Hat Enterprise Linux 10 httpd 2.4.63-13.el10_2.6 Red Hat JBoss Core Services jbcs-httpd24-httpd, jbcs-httpd24-mod_md, jbcs-httpd24-mod_ssl, jbcs-httpd24-mod_ldap, jbcs-httpd24-httpd-zip, jbcs-httpd24-httpd-libs, +6 more
    affected: workaround, no fix available “Fix deferred”
  • Red Hat Hardened Images httpd 2.4.69-1.hum1, mod_lua 2.4.69-1.hum1, mod_ssl 2.4.69-1.hum1, mod_ldap 2.4.69-1.hum1, httpd-core 2.4.69-1.hum1, httpd-tools 2.4.69-1.hum1, +4 more
    fixed: vendor fix RHSA-2026:74858
  • Red Hat Enterprise Linux 6 httpd, mod_ssl, httpd-tools, httpd-manual, httpd 2.4.63-13.el10_2.6 Red Hat Enterprise Linux 7 httpd, mod_ssl, mod_ldap, httpd-tools, mod_session, httpd-manual, +2 more Red Hat Enterprise Linux 8 httpd, mod_md, mod_ssl, mod_ldap, mod_http2, httpd-tools, +4 more
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
38 d ago

Exploit prediction

0.44% chance of exploitation in the next 30 days, higher than 38% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CISA ADP 3.1 3.7 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
CNA 3.1 3.7 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
OSV 3.1 3.7 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N

Affected packages

ecosystem package affected fixed in
bitnami apache
>=2.4.0, <2.4.69
2.4.69

Affected products

  • Apache Software Foundation Apache HTTP Server

Classification

Weakness
  • CWE-430 Deployment of Wrong Handler
Technology feeds

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.