UpHeron
All vulnerabilities

Servers and applications

CVE-2026-33523

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.

Severity
Medium 6.5
Published
4 May 2026
Last changed
17 Jun 2026
Added to UpHeron
17 Oct 2026
Fixed in
2.4.67
Sources
NVD

Affected software

SoftwareAffected versions
Apache HTTP ServerServers and applications · cpe:a:apache:http_server
  • From 2.4.0 before 2.4.67

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2026-33523
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2026-33523