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UBUNTU-CVE-2026-44631

0
Critical
VulnerabilityCVE-2026-44631gcveosvubuntu-cve-2026-44631ubuntu-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 buffer underwrite vulnerability exists in Apache HTTP Server versions from 2.4.0 through 2.4.67, triggered by crafted regular expressions in the configuration. This vulnerability allows for potential compromise of confidentiality, integrity, and availability. The issue is fixed in Apache HTTP Server version 2.4.68, and users are advised to upgrade to this version to mitigate the risk.

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:16.04:LTSmore threats →ghsa
apache2
pkg:deb/ubuntu/[email protected]+esm18?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
Ubuntu:Pro:18.04:LTSmore threats →ghsa
apache2
pkg:deb/ubuntu/[email protected]+esm9?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
Ubuntu:Pro:20.04:LTSmore threats →ghsa
apache2
pkg:deb/ubuntu/[email protected]+esm4?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
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: 07/16/2026, 10:45:50 UTC

Technical Analysis

The vulnerability is a buffer underwrite in Apache HTTP Server affecting versions 2.4.0 through 2.4.67. It is caused by crafted regular expressions in the server configuration, which can lead to memory corruption. This can impact the confidentiality, integrity, and availability of the server. The issue is resolved in version 2.4.68, which users should upgrade to in order to remediate the vulnerability.

Potential Impact

Successful exploitation of this vulnerability can result in complete compromise of the affected Apache HTTP Server, impacting confidentiality, integrity, and availability. This means attackers could potentially execute arbitrary code, cause denial of service, or access sensitive information.

Mitigation Recommendations

An official fix is available in Apache HTTP Server version 2.4.68. Users should upgrade to this version to remediate the vulnerability. No other mitigation steps are indicated by the vendor advisory.

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Technical Details

Gcve Source
db.gcve.eu
Osv Id
UBUNTU-CVE-2026-44631
Osv Schema Version
1.7.0
Aliases
[]
Ecosystems
["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: 6a58b3ff68715ace43d66cd5

Added to database: 07/16/2026, 10:35:43 UTC

Last enriched: 07/16/2026, 10:45:50 UTC

Last updated: 07/31/2026, 19:24:47 UTC

Views: 11

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