Buffer Over-read in Apache HTTP Server

Publication date: 2026-05-04

Last updated on: 2026-05-04

Assigner: Apache Software Foundation

Description

Buffer Over-read vulnerability in Apache HTTP Server. This issue affects Apache HTTP Server: through 2.4.66. Users are recommended to upgrade to version 2.4.67, which fixes the issue.

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published

2026-05-04

Last Modified

2026-05-04

Generated

2026-07-06

AI Q&A

2026-05-05

EPSS Evaluated

2026-07-05

NVD

CVE-2026-34059

Affected Vendors & Products

Vendor	Product	Version / Range
apache	http_server	to 2.4.67 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-126	The product reads from a buffer using buffer access mechanisms such as indexes or pointers that reference memory locations after the targeted buffer.

Attack-Flow Graph

Executive Summary

This vulnerability is a buffer over-read issue in the Apache HTTP Server. It occurs in versions up to 2.4.66 and involves the server reading more data than it should from a buffer, which can lead to exposure of sensitive information or cause unexpected behavior.

Impact Analysis

The impact of this vulnerability can be significant as it allows an attacker to read sensitive data from the server's memory without authorization. According to the CVSS score of 7.5, it is a high-severity issue that can lead to confidentiality breaches, although it does not affect integrity or availability.

Mitigation Strategies

To mitigate this vulnerability, users are recommended to upgrade Apache HTTP Server to version 2.4.67, which contains the fix for the buffer over-read issue.

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