CVE-2026-34356 Details
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.
A heap-based buffer overflow vulnerability has been identified in Apache HTTP Server versions 2.4.0 prior to 2.4.67. This vulnerability arises when the server is configured with malicious backend servers and uses the ProxyPassReverseCookie directive. The flaw allows an attacker to exploit the buffer overflow, potentially leading to arbitrary code execution or causing the server to crash.
Users are advised to upgrade to Apache HTTP Server version 2.4.68, which addresses this vulnerability.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Jun 8, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| http://www.openwall.com/lists/oss-security/2026/06/08/7 | CVE | Mailing List |
| https://httpd.apache.org/security/vulnerabilities_24.html | [email protected] | Vendor Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-122 | Heap-based Buffer Overflow | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| apache http server | >= 2.4.0, < 2.4.68 |
CPE
Remediation
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Change History
7 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jul 23, 2026 | CVE Translated | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 9, 2026 | Initial Analysis | [email protected] |
| Jun 8, 2026 | CVE Modified | CVE |
| Jun 8, 2026 | CVE Modified | CISA-ADP |
| Jun 8, 2026 | New CVE Received | [email protected] |