Vulnerability · Published May 4, 2026 · Assigned by apache
CVE-2026-33007Apache HTTP Server: mod_authn_socache crash
Medium 5.3
In plain English
A medium-severity null pointer dereference in Apache HTTP Server from Apache Software Foundation. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 44% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)5.3Medium
Exploit odds (30 days)0.5%top 56.0% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
A NULL pointer dereference in the mod_authn_socache in Apache HTTP Server 2.4.66 and earlier allows an unauthenticated remote user to crash a child process in a caching forward proxy configuration. Users are recommended to upgrade to version 2.4.67, which fixes this issue.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux:10 | httpd | 2.4.63-13.el10_2.1 | ALSA-2026:21433 |
| AlmaLinux:8 | httpd | 2.4.37-65.module_el8.10.0+4185+0955a0d7.8 | ALSA-2026:22140 |
| AlmaLinux:9 | httpd | 2.4.62-13.el9_8.1 | ALSA-2026:21391 |
| AlmaLinux:10 | httpd-core | 2.4.63-13.el10_2.1 | ALSA-2026:21433 |
| AlmaLinux:9 | httpd-core | 2.4.62-13.el9_8.1 | ALSA-2026:21391 |
| AlmaLinux:10 | httpd-devel | 2.4.63-13.el10_2.1 | ALSA-2026:21433 |
| AlmaLinux:8 | httpd-devel | 2.4.37-65.module_el8.10.0+4185+0955a0d7.8 | ALSA-2026:22140 |
| AlmaLinux:9 | httpd-devel | 2.4.62-13.el9_8.1 | ALSA-2026:21391 |
| AlmaLinux:10 | httpd-filesystem | 2.4.63-13.el10_2.1 | ALSA-2026:21433 |
| AlmaLinux:8 | httpd-filesystem | 2.4.37-65.module_el8.10.0+4185+0955a0d7.8 | ALSA-2026:22140 |
| AlmaLinux:9 | httpd-filesystem | 2.4.62-13.el9_8.1 | ALSA-2026:21391 |
| AlmaLinux:10 | httpd-manual | 2.4.63-13.el10_2.1 | ALSA-2026:21433 |
| AlmaLinux:8 | httpd-manual | 2.4.37-65.module_el8.10.0+4185+0955a0d7.8 | ALSA-2026:22140 |
| AlmaLinux:9 | httpd-manual | 2.4.62-13.el9_8.1 | ALSA-2026:21391 |
| AlmaLinux:10 | httpd-tools | 2.4.63-13.el10_2.1 | ALSA-2026:21433 |
| AlmaLinux:8 | httpd-tools | 2.4.37-65.module_el8.10.0+4185+0955a0d7.8 | ALSA-2026:22140 |
| AlmaLinux:9 | httpd-tools | 2.4.62-13.el9_8.1 | ALSA-2026:21391 |
| AlmaLinux:8 | mod_http2 | 1.15.7-10.module_el8.10.0+4185+0955a0d7.5 | ALSA-2026:22140 |
| AlmaLinux:10 | mod_ldap | 2.4.63-13.el10_2.1 | ALSA-2026:21433 |
| AlmaLinux:8 | mod_ldap | 2.4.37-65.module_el8.10.0+4185+0955a0d7.8 | ALSA-2026:22140 |
| AlmaLinux:9 | mod_ldap | 2.4.62-13.el9_8.1 | ALSA-2026:21391 |
| AlmaLinux:10 | mod_lua | 2.4.63-13.el10_2.1 | ALSA-2026:21433 |
| AlmaLinux:9 | mod_lua | 2.4.62-13.el9_8.1 | ALSA-2026:21391 |
| AlmaLinux:8 | mod_md | 1:2.0.8-8.module_el8.10.0+4088+57f011c1.2 | ALSA-2026:22140 |
| AlmaLinux:10 | mod_proxy_html | 1:2.4.63-13.el10_2.1 | ALSA-2026:21433 |
| AlmaLinux:8 | mod_proxy_html | 1:2.4.37-65.module_el8.10.0+4185+0955a0d7.8 | ALSA-2026:22140 |
| AlmaLinux:9 | mod_proxy_html | 1:2.4.62-13.el9_8.1 | ALSA-2026:21391 |
| AlmaLinux:10 | mod_session | 2.4.63-13.el10_2.1 | ALSA-2026:21433 |
| AlmaLinux:8 | mod_session | 2.4.37-65.module_el8.10.0+4185+0955a0d7.8 | ALSA-2026:22140 |
| AlmaLinux:9 | mod_session | 2.4.62-13.el9_8.1 | ALSA-2026:21391 |
| AlmaLinux:10 | mod_ssl | 1:2.4.63-13.el10_2.1 | ALSA-2026:21433 |
| AlmaLinux:8 | mod_ssl | 1:2.4.37-65.module_el8.10.0+4185+0955a0d7.8 | ALSA-2026:22140 |
| AlmaLinux:9 | mod_ssl | 1:2.4.62-13.el9_8.1 | ALSA-2026:21391 |
| Alpine:v3.20 | apache2 | 2.4.67-r0 | ALPINE-CVE-2026-33007 |
| Alpine:v3.21 | apache2 | 2.4.67-r0 | ALPINE-CVE-2026-33007 |
| Alpine:v3.22 | apache2 | 2.4.67-r0 | ALPINE-CVE-2026-33007 |
| Alpine:v3.23 | apache2 | 2.4.67-r0 | ALPINE-CVE-2026-33007 |
| Alpine:v3.24 | apache2 | 2.4.67-r0 | ALPINE-CVE-2026-33007 |
| Debian:12 | apache2 | 2.4.67-1~deb12u2 | DEBIAN-CVE-2026-33007 |
| Debian:13 | apache2 | 2.4.67-1~deb13u2 | DEBIAN-CVE-2026-33007 |
| Debian:14 | apache2 | 2.4.67-1 | DEBIAN-CVE-2026-33007 |
| Rocky Linux:10 | httpd | 0:2.4.63-13.el10_2.1 | RLSA-2026:21433 |
| Rocky Linux:8 | httpd | 0:2.4.37-65.module+el8.10.0+1830+22f0c9e0 | RLSA-2026:22140 |
| Rocky Linux:8 | httpd | 0:2.4.37-65.module+el8.10.0+2061+8d03fdec.5 | RLSA-2026:22140 |
| Rocky Linux:8 | httpd | 0:2.4.37-65.module+el8.10.0+40053+5a18018e.7 | RLSA-2026:22140 |
| Rocky Linux:8 | httpd | 0:2.4.37-65.module+el8.10.0+1840+b070a976.1 | RLSA-2026:22140 |
| Rocky Linux:8 | httpd | 0:2.4.37-65.module+el8.10.0+1842+4a9649e8.2 | RLSA-2026:22140 |
| Rocky Linux:8 | httpd | 0:2.4.37-65.module+el8.10.0+40045+6ce8579b.6 | RLSA-2026:22140 |
| Rocky Linux:8 | httpd | 0:2.4.37-65.module+el8.10.0+1984+1bed3124.4 | RLSA-2026:22140 |
| Rocky Linux:8 | httpd | 0:2.4.37-65.module+el8.10.0+1938+3b7755d4.3 | RLSA-2026:22140 |
| Rocky Linux:9 | httpd | 0:2.4.62-13.el9_8.1 | RLSA-2026:21391 |
| Rocky Linux:8 | mod_http2 | 0:1.15.7-10.module+el8.10.0+1883+38ed6c58.1 | RLSA-2026:22140 |
| Rocky Linux:8 | mod_http2 | 0:1.15.7-10.module+el8.10.0+1775+6b057638 | RLSA-2026:22140 |
| Rocky Linux:8 | mod_http2 | 0:1.15.7-10.module+el8.10.0+1830+22f0c9e0 | RLSA-2026:22140 |
| Rocky Linux:8 | mod_http2 | 0:1.15.7-10.module+el8.10.0+1938+3b7755d4.3 | RLSA-2026:22140 |
| Rocky Linux:8 | mod_http2 | 0:1.15.7-10.module+el8.10.0+2061+8d03fdec.4 | RLSA-2026:22140 |
| Rocky Linux:8 | mod_md | 1:2.0.8-8.module+el8.10.0+40053+5a18018e.2 | RLSA-2026:22140 |
| Rocky Linux:8 | mod_md | 1:2.0.8-8.module+el8.9.0+1370+89cc8ad5 | RLSA-2026:22140 |
| Ubuntu:22.04:LTS | apache2 | 2.4.52-1ubuntu4.20 | UBUNTU-CVE-2026-33007 |
| Ubuntu:24.04:LTS | apache2 | 2.4.58-1ubuntu8.12 | UBUNTU-CVE-2026-33007 |
| Ubuntu:25.10 | apache2 | 2.4.64-1ubuntu3.4 | UBUNTU-CVE-2026-33007 |
| Ubuntu:26.04:LTS | apache2 | 2.4.66-2ubuntu2.1 | UBUNTU-CVE-2026-33007 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Apache Software Foundation | Apache HTTP Server | 2.4.0 – through 2.4.66 |
Weakness: CWE-476 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L