CVE-2026-29167
A critical flaw in Apache HTTP Server’s LDAP module can let attackers crash the server or run code after the server frees memory. The bug is in the per‑directory configuration of mod_ldap and affects versions 2.4.0 through 2.4.67. Upgrading to 2.4.68 or later removes the vulnerability.
An official fix is available, so this entry is kept for 30 days and then removed automatically.
Who is affected
Apache HTTP Server 2.4.0 through 2.4.67, used by web administrators running the mod_ldap module.
Real-world impact
An attacker could crash the web server or execute malicious code, potentially taking control of the machine or disrupting services.
Why this severity
The CVSS score of 9.8 reflects that the flaw can be exploited over the network with no user interaction, and it can compromise confidentiality, integrity, and availability.
What to do about it
- 01Upgrade Apache HTTP Server to version 2.4.68 or later.
NVD-referenced vendor advisory
Timeline
- Jun 8, 2026 · Jun 8, 2026PublishedDisclosed and added to the National Vulnerability Database.
- Jul 23, 2026 · 12d agoAdvisory updatedThe NVD record was last revised.
- Jul 24, 2026 · 11d agoOfficial fix availableA vendor patch or mitigation now exists — see the remediation steps above.
How it’s attacked
References & advisories
- httpd.apache.org/security/vulnerabilities_24…vendor advisory
- openwall.com/lists/oss-security/2026/06/…mailing listthird party advisory
- openwall.com/lists/oss-security/2026/06/…mailing list