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VulnerabilityPublished Updated

CVE-2026-109163: Apache2 · mod_vhost_alias 1 byte stack buffer overwrite (after CVE-2026-63292)

Affects apache2Source GCVE Database

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Mentioned vulnerabilities

Authoritative record:CVE-2026-109163

Not known to be exploited · fixed in 2.4.7-1ubuntu4.22+esm19 : update apache2 when convenient.

Data as of 13 Nov 2026, 14:17 UTC

Severity
Low

Rated by Threat Radar · CVSS not yet scored by NVD

Thin evidence

One scorer or none
Patch
Available – fixed in 2.4.7-1ubuntu4.22+esm19, 2.4.18-2ubuntu3.17+esm24, 2.4.29-1ubuntu4.27+esm15 +5

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 11 Nov 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 13 Nov 2026.

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

ProductAffectedFixed in
Ubuntu 26.10apache2pkg:deb/ubuntu/apache2?arch=source&distro=stonkingOther threatsAffected
  • <2.4.68-1ubuntu6.2
Fixed in
  • 2.4.68-1ubuntu6.2
Ubuntu 26.04 LTSapache2pkg:deb/ubuntu/apache2?arch=source&distro=resoluteOther threatsAffected
  • <2.4.66-2ubuntu2.8
Fixed in
  • 2.4.66-2ubuntu2.8
Ubuntu 24.04 LTSapache2pkg:deb/ubuntu/apache2?arch=source&distro=nobleOther threatsAffected
  • <2.4.58-1ubuntu8.19
Fixed in
  • 2.4.58-1ubuntu8.19
Ubuntu 22.04 LTSapache2pkg:deb/ubuntu/apache2?arch=source&distro=jammyOther threatsAffected
  • <2.4.52-1ubuntu4.27
Fixed in
  • 2.4.52-1ubuntu4.27
Ubuntu Pro 20.04 LTSapache2pkg:deb/ubuntu/apache2?arch=source&distro=esm-infra/focalOther threatsAffected
  • <2.4.41-4ubuntu3.23+esm11
Fixed in
  • 2.4.41-4ubuntu3.23+esm11
Ubuntu Pro 18.04 LTSapache2pkg:deb/ubuntu/apache2?arch=source&distro=esm-infra/bionicOther threatsAffected
  • <2.4.29-1ubuntu4.27+esm15
Fixed in
  • 2.4.29-1ubuntu4.27+esm15

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

A fix for this vulnerability is available and has been released in updated Apache2 package versions for affected Ubuntu releases. Users should apply the security updates as provided in Ubuntu Security Notice USN-9090-1 to remediate this issue. Standard system updates will apply the necessary patches.

Description

A one-byte stack buffer overflow vulnerability exists in the Apache HTTP Server's mod_vhost_alias module. This flaw could allow a remote attacker to cause the server to crash or potentially execute arbitrary code. The issue affects multiple Ubuntu package versions of Apache2 and has been addressed in updated package releases. The vulnerability is considered low severity and no known exploits are reported in the wild.

References

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