PT-2026-47317 · Apache · Apache Http Server

Arkadi Vainbrand + 1 · Published 2026-06-08 · Updated 2026-06-08 · CVE-2026-34356

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

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

Name of the Vulnerable Software and Affected Versions Apache HTTP Server versions 2.4.0 through 2.4.67

Description A heap-based buffer overflow occurs when interacting with malicious backend servers using ProxyPassReverseCookie*. A heap-based buffer overflow is a memory corruption issue where data exceeds the allocated boundary of a buffer on the heap, potentially leading to crashes or arbitrary code execution.

Recommendations Upgrade to version 2.4.68.

Fix

DoS

Heap Based Buffer Overflow

Weakness Enumeration

CWE-122

Related Identifiers

CVE-2026-34356

Affected Products

Apache Http Server

References · 3

• https://nvd.nist.gov/vuln/detail/CVE-2026-34356 · Security Note
• https://httpd.apache.org/security/vulnerabilities_24.html · Vendor Advisory
• https://httpd.apache.org/security/vulnerabilities_24.html#CVE-2026-34356 · Note