CVE-2026-33523

Summary

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 Software

VendorProductVersion RangeStatus
Apache Software FoundationApache HTTP Server2.4.0 <= 2.4.66affected

Weaknesses

  • CWE-443: CWE-443: HTTP response splitting

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: yes
    • Technical Impact: partial

CVE Program Container

Additional References

References