CVE-2026-29169
published 2026-05-04CVE-2026-29169: A NULL pointer dereference in mod_dav_lock in Apache HTTP Server 2.4.66 and earlier may allow an attacker to crash the server with a malicious…
PriorityP345high7.5CVSS 3.1
AVNACLPRNUINSUCNINAH
EPSS
0.59%
44.5th percentile
A NULL pointer dereference in mod_dav_lock in Apache HTTP Server 2.4.66 and earlier may allow an attacker to crash the server with a malicious request.mod_dav_lock is not used internally by mod_dav or mod_dav_fs.
The only known use-case for mod_dav_lock was mod_dav_svn from Apache Subversion earlier than version 1.2.0.
Users are recommended to upgrade to version 2.4.66, which fixes this issue, or remove mod_dav_lock.
Affected
5 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| apache | http_server | < 2.4.67 | 2.4.67 |
| apache | httpd | — | — |
| apache_software_foundation | apache_http_server | <= 2.4.66 | — |
| httpd_2.4 | httpd | — | — |
| ubuntu | apache2 | — | — |
CVSS provenance
nvdv3.17.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
vendor_ubuntu8.8HIGH
vendor_redhat7.5HIGH
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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_dav_lock: NULL pointer dereference via specially crafted request
vendor_redhat·2026-05-04·CVSS 7.5
CVE-2026-29169 [HIGH] CWE-476 httpd: mod_dav_lock: NULL pointer dereference via specially crafted request
httpd: mod_dav_lock: NULL pointer dereference via specially crafted request
A flaw was found in the mod_dav_lock module of httpd. This vulnerability allows a remote unauthenticated attacker to crash the server due to a NULL pointer dereference via a specially crafted request.
Statement: This issue allows an unauthenticated remote attacker to crash the server via a specially crafted request. However, the mod_dav_lock module is obsolete and rarely enabled in modern environments. The only known use-case for the module was mod_dav_svn from Apache Subversion earlier than version 1.2.0. Due to this reason, this vulnerability has been rated with a moderate severity.
This flaw only affects configurations with mod_dav_lock loaded and being used. This module can be disabled via the configuration f
GHSA
GHSA-jmv5-rcpx-7f7r: A NULL pointer dereference in mod_dav_lock in Apache HTTP Server 2
ghsa_unreviewed·2026-05-04
CVE-2026-29169 [HIGH] CWE-476 GHSA-jmv5-rcpx-7f7r: A NULL pointer dereference in mod_dav_lock in Apache HTTP Server 2
A NULL pointer dereference in mod_dav_lock in Apache HTTP Server 2.4.66 and earlier may allow an attacker to crash the server with a malicious request.mod_dav_lock is not used internally by mod_dav or mod_dav_fs.
The only known use-case for mod_dav_lock was mod_dav_svn from Apache Subversion earlier than version 1.2.0.
Users are recommended to upgrade to version 2.4.66, which fixes this issue, or remove mod_dav_lock.
No detection rules found.
No public exploits indexed.
Bugzilla
CVE-2026-29169 httpd: NULL pointer dereference via specially crafted request [fedora-all]
bugzilla·2026-05-12·CVSS 7.5
CVE-2026-29169 [HIGH] CVE-2026-29169 httpd: NULL pointer dereference via specially crafted request [fedora-all]
CVE-2026-29169 httpd: NULL pointer dereference via specially crafted request [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-2026-29169 httpd: mod_dav_lock: NULL pointer dereference via specially crafted request
bugzilla·2026-05-04·CVSS 7.5
CVE-2026-29169 [HIGH] CVE-2026-29169 httpd: mod_dav_lock: NULL pointer dereference via specially crafted request
CVE-2026-29169 httpd: mod_dav_lock: NULL pointer dereference via specially crafted request
A NULL pointer dereference in mod_dav_lock in Apache HTTP Server 2.4.66 and earlier may allow an attacker to crash the server with a malicious request.mod_dav_lock is not used internally by mod_dav or mod_dav_fs.
The only known use-case for mod_dav_lock was mod_dav_svn from Apache Subversion earlier than version 1.2.0.
Users are recommended to upgrade to version 2.4.66, which fixes this issue, or remove mod_dav_lock.
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