Out-of-Bounds Read Vulnerability in Apache HTTP Server by Apache
CVE-2026-43951

6.5MEDIUM

Key Information:

Vendor

Apache
Status
Apache Http Server
Vendor
CVE Published:
8 June 2026

What is CVE-2026-43951?

An Out-of-Bounds Read vulnerability exists in Apache HTTP Server, affecting versions 2.4.0 to 2.4.67. The issue arises when the server utilizes mod_headers and mod_mime in conjunction with multiple response languages, potentially allowing attackers to access sensitive information outside the intended memory bounds.

Affected Version(s)

Apache HTTP Server 2.4.0 <= 2.4.67

References

https://httpd.apache.org/security/vulnerabilities_24.html
vendor-advisory

CVSS V3.1

Score:
6.5
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Zhenpeng (Leo) Lin at depthfirst
.