Skip to main content
Threat Radar animated logo
DashboardThreatsMapFeedsPricingView Plans & Pricing
reconnecting
Press slash or control plus K to focus the search. Use the arrow keys to navigate results and press enter to open a threat.
Reconnecting to live updates…
EPSS 0.7%top 51%

Apache2: Use After Free vulnerability in Apache HTTP Server with mod_ldap in per-directory configuration This issue affects Apache HTTP Server: from 2.4.0…

0
Critical
VulnerabilityCVE-2026-29167gcveosvubuntu-cve-2026-29167ubuntu-pro-14-04-ltsubuntu-pro-16-04-ltsubuntu-pro-18-04-ltsubuntu-pro-20-04-ltsubuntu-22-04-ltsubuntu-24-04-ltsubuntu-25-10ubuntu-26-04-lts
Published: 06/08/2026 (06/08/2026, 16:16:00 UTC)
Source: GCVE Database
Product: apache2

Description

A Use After Free vulnerability exists in Apache HTTP Server's mod_ldap module when used in per-directory configuration. This affects Apache HTTP Server versions from 2.4.0 through 2.4.67. The vulnerability is resolved in version 2.4.68. Exploitation could lead to high impact on confidentiality, integrity, and availability.

CVSS v3.1

Score 9.8critical

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected software

Ubuntu:Pro:14.04:LTSmore threats →ghsa
apache2
pkg:deb/ubuntu/[email protected]+esm15?arch=source&distro=esm-infra-legacy/trusty
Affected versions
=2.4.6-2ubuntu2=2.4.6-2ubuntu3=2.4.6-2ubuntu4=2.4.7-1ubuntu1=2.4.7-1ubuntu2=2.4.7-1ubuntu3=2.4.7-1ubuntu4=2.4.7-1ubuntu4.1=2.4.7-1ubuntu4.4=2.4.7-1ubuntu4.5=2.4.7-1ubuntu4.6=2.4.7-1ubuntu4.7=2.4.7-1ubuntu4.8=2.4.7-1ubuntu4.9=2.4.7-1ubuntu4.10=2.4.7-1ubuntu4.11=2.4.7-1ubuntu4.13=2.4.7-1ubuntu4.15=2.4.7-1ubuntu4.16=2.4.7-1ubuntu4.17=2.4.7-1ubuntu4.18=2.4.7-1ubuntu4.19=2.4.7-1ubuntu4.20=2.4.7-1ubuntu4.21=2.4.7-1ubuntu4.22=2.4.7-1ubuntu4.22+esm1=2.4.7-1ubuntu4.22+esm2=2.4.7-1ubuntu4.22+esm3=2.4.7-1ubuntu4.22+esm4=2.4.7-1ubuntu4.22+esm5=2.4.7-1ubuntu4.22+esm6=2.4.7-1ubuntu4.22+esm8=2.4.7-1ubuntu4.22+esm9=2.4.7-1ubuntu4.22+esm10=2.4.7-1ubuntu4.22+esm12=2.4.7-1ubuntu4.22+esm13=2.4.7-1ubuntu4.22+esm14=2.4.7-1ubuntu4.22+esm15
Ubuntu:Pro:16.04:LTSmore threats →ghsa
apache2
pkg:deb/ubuntu/[email protected]+esm20?arch=source&distro=esm-infra-legacy/xenial
Affected versions
=2.4.12-2ubuntu2=2.4.17-1ubuntu1=2.4.17-2ubuntu1=2.4.17-3ubuntu1=2.4.18-1ubuntu1=2.4.18-2ubuntu1=2.4.18-2ubuntu2=2.4.18-2ubuntu3=2.4.18-2ubuntu3.1=2.4.18-2ubuntu3.2=2.4.18-2ubuntu3.3=2.4.18-2ubuntu3.4=2.4.18-2ubuntu3.5=2.4.18-2ubuntu3.7=2.4.18-2ubuntu3.8=2.4.18-2ubuntu3.9=2.4.18-2ubuntu3.10=2.4.18-2ubuntu3.12=2.4.18-2ubuntu3.13=2.4.18-2ubuntu3.14=2.4.18-2ubuntu3.15=2.4.18-2ubuntu3.17=2.4.18-2ubuntu3.17+esm1=2.4.18-2ubuntu3.17+esm2=2.4.18-2ubuntu3.17+esm3=2.4.18-2ubuntu3.17+esm4=2.4.18-2ubuntu3.17+esm5=2.4.18-2ubuntu3.17+esm6=2.4.18-2ubuntu3.17+esm7=2.4.18-2ubuntu3.17+esm8=2.4.18-2ubuntu3.17+esm9=2.4.18-2ubuntu3.17+esm10=2.4.18-2ubuntu3.17+esm11=2.4.18-2ubuntu3.17+esm12=2.4.18-2ubuntu3.17+esm13=2.4.18-2ubuntu3.17+esm14=2.4.18-2ubuntu3.17+esm16=2.4.18-2ubuntu3.17+esm17=2.4.18-2ubuntu3.17+esm18=2.4.18-2ubuntu3.17+esm19=2.4.18-2ubuntu3.17+esm20
Ubuntu:Pro:18.04:LTSmore threats →ghsa
apache2
pkg:deb/ubuntu/[email protected]+esm11?arch=source&distro=esm-infra/bionic
Affected versions
=2.4.27-2ubuntu3=2.4.29-1ubuntu1=2.4.29-1ubuntu2=2.4.29-1ubuntu3=2.4.29-1ubuntu4=2.4.29-1ubuntu4.1=2.4.29-1ubuntu4.2=2.4.29-1ubuntu4.3=2.4.29-1ubuntu4.4=2.4.29-1ubuntu4.5=2.4.29-1ubuntu4.6=2.4.29-1ubuntu4.7=2.4.29-1ubuntu4.8=2.4.29-1ubuntu4.10=2.4.29-1ubuntu4.11=2.4.29-1ubuntu4.12=2.4.29-1ubuntu4.13=2.4.29-1ubuntu4.14=2.4.29-1ubuntu4.16=2.4.29-1ubuntu4.17=2.4.29-1ubuntu4.18=2.4.29-1ubuntu4.19=2.4.29-1ubuntu4.20=2.4.29-1ubuntu4.21=2.4.29-1ubuntu4.22=2.4.29-1ubuntu4.23=2.4.29-1ubuntu4.24=2.4.29-1ubuntu4.25=2.4.29-1ubuntu4.26=2.4.29-1ubuntu4.27=2.4.29-1ubuntu4.27+esm1=2.4.29-1ubuntu4.27+esm2=2.4.29-1ubuntu4.27+esm3=2.4.29-1ubuntu4.27+esm4=2.4.29-1ubuntu4.27+esm6=2.4.29-1ubuntu4.27+esm7=2.4.29-1ubuntu4.27+esm8=2.4.29-1ubuntu4.27+esm9=2.4.29-1ubuntu4.27+esm10=2.4.29-1ubuntu4.27+esm11
Ubuntu:Pro:20.04:LTSmore threats →ghsa
apache2
pkg:deb/ubuntu/[email protected]+esm6?arch=source&distro=esm-infra/focal
Affected versions
=2.4.41-1ubuntu1=2.4.41-4ubuntu1=2.4.41-4ubuntu2=2.4.41-4ubuntu3=2.4.41-4ubuntu3.1=2.4.41-4ubuntu3.3=2.4.41-4ubuntu3.4=2.4.41-4ubuntu3.5=2.4.41-4ubuntu3.6=2.4.41-4ubuntu3.7=2.4.41-4ubuntu3.8=2.4.41-4ubuntu3.9=2.4.41-4ubuntu3.10=2.4.41-4ubuntu3.11=2.4.41-4ubuntu3.12=2.4.41-4ubuntu3.13=2.4.41-4ubuntu3.14=2.4.41-4ubuntu3.15=2.4.41-4ubuntu3.16=2.4.41-4ubuntu3.17=2.4.41-4ubuntu3.19=2.4.41-4ubuntu3.20=2.4.41-4ubuntu3.21=2.4.41-4ubuntu3.23=2.4.41-4ubuntu3.23+esm2=2.4.41-4ubuntu3.23+esm3=2.4.41-4ubuntu3.23+esm4=2.4.41-4ubuntu3.23+esm5=2.4.41-4ubuntu3.23+esm6
Ubuntu:22.04:LTSmore threats →ghsa
apache2
pkg:deb/ubuntu/[email protected]?arch=source&distro=jammy
Affected versions
<2.4.52-1ubuntu4.23=2.4.48-3.1ubuntu3=2.4.48-3.1ubuntu4=2.4.51-2ubuntu1=2.4.52-1ubuntu1=2.4.52-1ubuntu2=2.4.52-1ubuntu4=2.4.52-1ubuntu4.1=2.4.52-1ubuntu4.2=2.4.52-1ubuntu4.3=2.4.52-1ubuntu4.4=2.4.52-1ubuntu4.5=2.4.52-1ubuntu4.6=2.4.52-1ubuntu4.7=2.4.52-1ubuntu4.8=2.4.52-1ubuntu4.9=2.4.52-1ubuntu4.10=2.4.52-1ubuntu4.11=2.4.52-1ubuntu4.12=2.4.52-1ubuntu4.13=2.4.52-1ubuntu4.14=2.4.52-1ubuntu4.15=2.4.52-1ubuntu4.16=2.4.52-1ubuntu4.18=2.4.52-1ubuntu4.19=2.4.52-1ubuntu4.20=2.4.52-1ubuntu4.21
Ubuntu:24.04:LTSmore threats →ghsa
apache2
pkg:deb/ubuntu/[email protected]?arch=source&distro=noble
Affected versions
<2.4.58-1ubuntu8.15=2.4.57-2ubuntu2=2.4.57-2ubuntu3=2.4.58-1ubuntu1=2.4.58-1ubuntu2=2.4.58-1ubuntu6=2.4.58-1ubuntu7=2.4.58-1ubuntu8=2.4.58-1ubuntu8.1=2.4.58-1ubuntu8.2=2.4.58-1ubuntu8.3=2.4.58-1ubuntu8.4=2.4.58-1ubuntu8.5=2.4.58-1ubuntu8.6=2.4.58-1ubuntu8.7=2.4.58-1ubuntu8.8=2.4.58-1ubuntu8.10=2.4.58-1ubuntu8.11=2.4.58-1ubuntu8.12=2.4.58-1ubuntu8.13
Ubuntu:25.10more threats →ghsa
apache2
pkg:deb/ubuntu/[email protected]?arch=source&distro=questing
Affected versions
=2.4.63-1ubuntu1=2.4.63-1ubuntu3=2.4.64-1ubuntu2=2.4.64-1ubuntu3=2.4.64-1ubuntu3.2=2.4.64-1ubuntu3.3=2.4.64-1ubuntu3.4=2.4.64-1ubuntu3.5
Ubuntu:26.04:LTSmore threats →ghsa
apache2
pkg:deb/ubuntu/[email protected]?arch=source&distro=resolute
Affected versions
<2.4.66-2ubuntu2.4=2.4.64-1ubuntu3=2.4.65-3ubuntu1=2.4.66-2ubuntu1=2.4.66-2ubuntu2=2.4.66-2ubuntu2.1=2.4.66-2ubuntu2.2

Run on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.

AI-Powered Analysis

Machine-generated threat intelligence

AILast updated: 07/22/2026, 23:55:10 UTC

Technical Analysis

The Apache HTTP Server with mod_ldap enabled and configured per-directory is vulnerable to a Use After Free condition. This vulnerability affects all versions starting from 2.4.0 up to and including 2.4.67. The issue is fixed in version 2.4.68. The CVSS 3.1 vector indicates network attack vector, low attack complexity, no privileges or user interaction required, and high impact on confidentiality, integrity, and availability.

Potential Impact

Successful exploitation of this Use After Free vulnerability can result in complete compromise of the affected server, including unauthorized disclosure of information, modification of data, and denial of service. The CVSS vector indicates critical impact on confidentiality, integrity, and availability without requiring privileges or user interaction.

Mitigation Recommendations

Users are strongly recommended to upgrade Apache HTTP Server to version 2.4.68 or later, where this vulnerability is fixed. No other mitigations are specified. Patch status is confirmed as fixed in 2.4.68.

Pro Console: star threats, build custom feeds, automate alerts via Slack, email & webhooks.Upgrade to Pro

Technical Details

Gcve Source
db.gcve.eu
Osv Id
UBUNTU-CVE-2026-29167
Osv Schema Version
1.7.0
Aliases
[]
Ecosystems
["Ubuntu:Pro:14.04:LTS","Ubuntu:Pro:16.04:LTS","Ubuntu:Pro:18.04:LTS","Ubuntu:Pro:20.04:LTS","Ubuntu:22.04:LTS","Ubuntu:24.04:LTS","Ubuntu:25.10","Ubuntu:26.04:LTS"]
Database Specific Severity
null
Cvss Version
3.1

Threat ID: 6a61511f9c2644c7f8da5f6b

Added to database: 07/22/2026, 23:24:15 UTC

Last enriched: 07/22/2026, 23:55:10 UTC

Last updated: 07/31/2026, 19:24:46 UTC

Views: 26

Community Reviews

0 reviews

Crowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.

Sort by
Loading community insights…

Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.

Actions

PRO

Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.

Please log in to the Console to use AI analysis features.

Need more coverage?

Upgrade to Pro Console for AI refresh and higher limits.

For incident response and remediation, OffSeq services can help resolve threats faster.

Latest Threats

Breach by OffSeqOFFSEQFRIENDS — 25% OFF

Check if your credentials are on the dark web

Instant breach scanning across billions of leaked records. Free tier available.

Scan now
OffSeq TrainingCredly Certified

Lead Pen Test Professional

Technical5-day eLearningPECB Accredited
View courses