CVE-2026-23918

EUVD-2026-26955
Double Free and possible RCE vulnerability in Apache HTTP Server with the HTTP/2 protocol.

This issue affects Apache HTTP Server: 2.4.66.

Users are recommended to upgrade to version 2.4.67, which fixes the issue.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
8.8 HIGH
NETWORK
LOW
LOW
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Base Score
CVSS 3.x
EPSS Score
Percentile: 93%
Affected Products (NVD)
VendorProductVersion
apachehttp_server
2.4.66
𝑥
= Vulnerable software versions
Debian logo
Debian Releases
Debian Product
Codename
apache2
bookworm
2.4.67-1~deb12u2
fixed
bookworm (security)
2.4.67-1~deb12u3
fixed
bullseye
2.4.62-1~deb11u1
fixed
bullseye (security)
2.4.67-1~deb11u3
fixed
forky
2.4.68-1
fixed
sid
2.4.68-1
fixed
trixie
2.4.67-1~deb13u2
fixed
trixie (security)
2.4.67-1~deb13u3
fixed
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
apache2
bionic
not-affected
focal
not-affected
jammy
not-affected
noble
not-affected
questing
not-affected
resolute
Fixed 2.4.66-2ubuntu2.1
released
trusty
not-affected
xenial
not-affected
openSUSE logo
openSUSE / SLES Releases
openSUSE Product
Release
apache2
suse enterprise desktop 15 SP7
2.4.66-150700.4.20.1
fixed
suse enterprise sap 15 SP7
2.4.66-150700.4.20.1
fixed
suse enterprise server 15 SP6
2.4.66-150600.5.52.1
fixed
suse enterprise server 15 SP7
2.4.66-150700.4.20.1
fixed
apache2-devel
suse enterprise sap 15 SP7
2.4.66-150700.4.20.1
fixed
suse enterprise server 15 SP6
2.4.66-150600.5.52.1
fixed
suse enterprise server 15 SP7
2.4.66-150700.4.20.1
fixed
apache2-manual
suse enterprise sap 15 SP7
2.4.66-150700.4.20.1
fixed
suse enterprise server 15 SP6
2.4.66-150600.5.52.1
fixed
suse enterprise server 15 SP7
2.4.66-150700.4.20.1
fixed
apache2-prefork
suse enterprise desktop 15 SP7
2.4.66-150700.4.20.1
fixed
suse enterprise sap 15 SP7
2.4.66-150700.4.20.1
fixed
suse enterprise server 15 SP6
2.4.66-150600.5.52.1
fixed
suse enterprise server 15 SP7
2.4.66-150700.4.20.1
fixed
apache2-utils
suse enterprise sap 15 SP7
2.4.66-150700.4.20.1
fixed
suse enterprise server 15 SP6
2.4.66-150600.5.52.1
fixed
suse enterprise server 15 SP7
2.4.66-150700.4.20.1
fixed
apache2-worker
suse enterprise sap 15 SP7
2.4.66-150700.4.20.1
fixed
suse enterprise server 15 SP6
2.4.66-150600.5.52.1
fixed
suse enterprise server 15 SP7
2.4.66-150700.4.20.1
fixed
Amazon Linux logo
Amazon Linux Releases
Amazon Package
Release
mod_http2
Amazon Linux 2023
0:2.0.39-1.amzn2023.0.1
fixed
mod_http2-debuginfo
Amazon Linux 2023
0:2.0.39-1.amzn2023.0.1
fixed
mod_http2-debugsource
Amazon Linux 2023
0:2.0.39-1.amzn2023.0.1
fixed
Azure Linux logo
Azure Linux Releases
Azure Package
Release
httpd
Azure Linux 3.0
0:2.4.67-1.azl3
fixed
Common Weakness Enumeration
Vulnerability Media Exposure
References
https://httpd.apache.org/security/vulnerabilities_24.html
http://www.openwall.com/lists/oss-security/2026/05/04/19