CVE-2026-49975

HIGH severity · CVSS 7.5 · CWE-789

7.5CVSS HIGH

Summary

Memory Allocation with Excessive Size Value vulnerability in Apache HTTP Server's mod_http leads to denial of service via malicious HTTP requests. This issue affects Apache HTTP Server: from 2.4.17 through 2.4.67.

Impact & exploitability

Attack vectorNetwork

Attack complexityLow

Privileges requiredNone

User interactionNone

Confidentiality impactNone

Integrity impactNone

Availability impactHigh

Exploit probability (EPSS)0%

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

Affected products we track (2)

Apache HTTP Server Nginx

Recommendation

Apply the vendor fix promptly. Open any affected product above for its exact safe version.

Additional information

NVD record
https://httpd.apache.org/security/vulnerabilities_24.htmlAdvisory
http://www.openwall.com/lists/oss-security/2026/06/03/3Advisory
http://www.openwall.com/lists/oss-security/2026/06/08/16Advisory
https://lists.debian.org/debian-lts-announce/2026/06/msg00009.htmlAdvisory