CVE-2026-33523
MEDIUM6.5EPSS 0.26%Apache HTTP Server: multiple modules: HTTP response splitting forwarding malicious status line
Published: 5/4/2026Modified: 5/13/2026
Description
HTTP response splitting vulnerability in multiple Apache HTTP Server modules with untrusted or compromised backend servers. This issue affects Apache HTTP Server: from through 2.4.66. Users are recommended to upgrade to version 2.4.67, which fixes the issue.
Affected packages (3)
- Alpine/apache2from 0, < 2.4.67-r0
- Bitnami/apache>= 2.4.0, < 2.4.67
- Debian/apache2from 0, < 2.4.67-1~deb11u1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM6.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N |