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CVE-2026-43951 | Mondoo Vulnerability Intelligence

Vulnerability IntelligenceCVE-2026-43951

CVE-2026-43951

MEDIUM6.5

Apache HTTP Server: OOB Read in `merge_response_headers` can cause crash

Published Jun 8, 2026

Modified 2 weeks ago

Details

Out-of-bounds Read vulnerability in Apache HTTP Server with mod_headers and mod_mime and multiple response languages.

This issue affects Apache HTTP Server: from 2.4.0 through 2.4.67.

References

http://www.openwall.com/lists/oss-security/2026/06/08/10

https://httpd.apache.org/security/vulnerabilities_24.html

https://www.cve.org/CVERecord?id=CVE-2026-43951

CVSS Analysis

CVSS v3.1

6.5

Exploitability

Attack Vector

NetworkAV:N

Attack Complexity

LowAC:L

Privileges Required

NonePR:N

User Interaction

NoneUI:N

Scope

Scope

UnchangedS:U

Impact

Confidentiality

LowC:L

Integrity

LowI:L

Availability

NoneA:N

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

Weakness Type (CWE)

Memory Safety

Out-of-bounds Read

Ecosystems

Timeline

PublishedJun 8, 2026

ModifiedJun 8, 2026