CVE-2026-63292

Apache HTTP Server: mod_vhost_alias stack overflow

Stack-based buffer overflow in mod_vhost_alias in Apache Software Foundation Apache HTTP Server through 2.4.68 on all platforms allows a remote client to cause a denial of service or potentially execute arbitrary code via an HTTP request with a Host header exceeding 8192 bytes when VirtualDocumentRoot uses a hostname format specifier and LimitRequestFieldSize is raised above the default. Users are recommended to upgrade to version 2.4.69, which fixes this issue.

Affected

Apache Software Foundation · Apache HTTP Server

CVSS v3.1 CNA

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

EPSS

0.88% chance of exploitation in the next 30 days, 58th percentile

Published

2026-10-01

Proof-of-concept exploits (1)

• 0xBlackash/CVE-2026-632920★ · 2026-10-02

Security advisories

• https://httpd.apache.org/security/vulnerabilities_24.html
• http://www.openwall.com/lists/oss-security/2026/10/01/24

References

• CVE Record
• NVD entry