CVE-2026-33007
published 2026-05-04CVE-2026-33007: 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…
PriorityP432medium5.3CVSS 3.1
AVNACLPRNUINSUCNINAL
EPSS
0.51%
40.7th percentile
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
5 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| apache | http_server | >= 2.4.0 < 2.4.67 | 2.4.67 |
| apache | httpd | — | — |
| apache_software_foundation | apache_http_server | 2.4.0 – 2.4.66 | — |
| httpd_2.4 | httpd | — | — |
| ubuntu | apache2 | — | — |
CVSS provenance
nvdv3.15.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
vendor_ubuntu8.8HIGH
vendor_redhat5.3MEDIUM
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Ubuntu
Apache HTTP Server vulnerabilities
vendor_ubuntu·2026-07-20·CVSS 5.3
CVE-2026-34032 [MEDIUM] Apache HTTP Server vulnerabilities
Title: Apache HTTP Server vulnerabilities
Summary: Several security issues were fixed in Apache HTTP Server.
Pavel Kohout and Arkadi Vainbrand discovered that Apache HTTP Server
incorrectly handled certain memory operations in mod_authn_socache. A
remote attacker could possibly use this issue to cause a denial of service.
(CVE-2026-33007)
Haruki Oyama, Merih Mengisteab, and Dawit Jeong discovered that Apache
HTTP Server had an HTTP response splitting vulnerability in multiple
modules when used with untrusted or compromised backend servers. An
attacker could possibly use this issue to inject arbitrary HTTP headers.
(CVE-2026-33523)
Elhanan Haenel discovered that Apache HTTP Server incorrectly handled
certain memory operations in mod_proxy_ajp. A remote attacker could
possibly use this i
Ubuntu
Apache HTTP Server vulnerabilities
vendor_ubuntu·2026-05-06·CVSS 8.8
CVE-2026-28780 [HIGH] Apache HTTP Server vulnerabilities
Title: Apache HTTP Server vulnerabilities
Summary: Several security issues were fixed in Apache HTTP Server.
Bartlomiej Dmitruk and Stanislaw Strzalkowski discovered that Apache
HTTP Server incorrectly handled certain memory operations when using the
HTTP/2 protocol. A remote attacker could use this issue to cause Apache
HTTP Server to crash, resulting in a denial of service, or possibly execute
arbitrary code. This issue only affected Ubuntu 26.04 LTS.
(CVE-2026-23918)
It was discovered that the Apache HTTP Server mod_rewrite module
incorrectly handled certain privileges. A local attacker could possibly use
this issue to obtain sensitive information. (CVE-2026-24072)
Andrew Lacambra, Elhanan Haenel, Tianshuo Han, and Tristan Madani
discovered that the Apache HTTP Server mod_proxy_ajp
Red Hat
httpd: mod_authn_socache: NULL pointer dereference can cause a child process crash
vendor_redhat·2026-05-04·CVSS 5.3
CVE-2026-33007 [MEDIUM] CWE-476 httpd: mod_authn_socache: NULL pointer dereference can cause a child process crash
httpd: mod_authn_socache: NULL pointer dereference can cause a child process crash
A flaw was found in the mod_authn_socache module of httpd. This vulnerability allows an unauthenticated remote user to crash a child process due to a NULL pointer dereference when the server is operating in a caching forward proxy configuration.
Statement: This issue allows an unauthenticated remote attacker to cause a crash in a child process. However, the main parent process remains active and functional. Due to this reason, this flaw has been rated with a moderate severity.
This flaw only affects configurations with mod_authn_socache loaded and being used. This module can be disabled via the configuration file if its functionality is not being used.
Mitigation: Disabling mod_authn_socache and restartin
GHSA
GHSA-cj6w-grf6-jq78: A NULL pointer dereference in the mod_authn_socache in Apache HTTP Server 2
ghsa_unreviewed·2026-05-04
CVE-2026-33007 [MEDIUM] CWE-476 GHSA-cj6w-grf6-jq78: A NULL pointer dereference in the mod_authn_socache in Apache HTTP Server 2
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.
No detection rules found.
No public exploits indexed.
Bugzilla
CVE-2026-33007 httpd: NULL pointer dereference can cause a child process crash [fedora-all]
bugzilla·2026-05-11·CVSS 5.3
CVE-2026-33007 [MEDIUM] CVE-2026-33007 httpd: NULL pointer dereference can cause a child process crash [fedora-all]
CVE-2026-33007 httpd: NULL pointer dereference can cause a child process crash [fedora-all]
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.
Bugzilla
CVE-2026-33007 httpd: mod_authn_socache: NULL pointer dereference can cause a child process crash
bugzilla·2026-05-04·CVSS 5.3
CVE-2026-33007 [MEDIUM] CVE-2026-33007 httpd: mod_authn_socache: NULL pointer dereference can cause a child process crash
CVE-2026-33007 httpd: mod_authn_socache: NULL pointer dereference can cause a child process crash
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.
Rapid7
Patch Tuesday - May 2026
blogs_rapid7·2026-05-13·CVSS 10.0
CVE-2026-41089 [CRITICAL] Patch Tuesday - May 2026
Microsoft is publishing 137 vulnerabilities on May 2026 Patch Tuesday . Microsoft is not aware of exploitation in the wild or public disclosure for any of these vulnerabilities. So far this month, Microsoft has provided patches to address 133 browser vulnerabilities, which are not included in the Patch Tuesday count above.
## Windows Netlogon: critical RCE
Anyone responsible for securing a domain controller should prioritize remediation of CVE-2026-41089 , which is a critical stack-based buffer overflow in Windows Netlogon with a CVSS v3 base score of 9.8. Exploitation leads to execution in the context of the Netlogon service, so that’s SYSTEM privileges on the domain controller. For most pentesters, that’s the point at which the customer report more or less writes itself. No privileges
2026-05-04
Published