CVE-2026-34356

Publication date 8 June 2026

Last updated 8 July 2026

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

7.5 · High

Score breakdown

Description

Heap-based Buffer Overflow vulnerability in Apache HTTP Server with malicious backend servers and ProxyPassReverseCookie* This issue affects Apache HTTP Server: from 2.4.0 through 2.4.67. Users are recommended to upgrade to version 2.4.68, which fixes the issue.

Status

Package Ubuntu Release Status
apache2 26.04 LTS resolute
Fixed 2.4.66-2ubuntu2.4
25.10 questing
Needs evaluation
24.04 LTS noble
Fixed 2.4.58-1ubuntu8.15
22.04 LTS jammy
Fixed 2.4.52-1ubuntu4.23
20.04 LTS focal
Needs evaluation
18.04 LTS bionic
Needs evaluation
16.04 LTS xenial
Needs evaluation
14.04 LTS trusty
Needs evaluation

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package Patch details
apache2

Severity score breakdown

CVSS version: CVSS v3.0

Base score 7.5 · High

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References

Related Ubuntu Security Notices (USN)

    • USN-8516-1
    • Apache HTTP Server vulnerabilities
    • 8 July 2026

Other references

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