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CVE-2026-33523mediumCWE-443

Apache HTTP Server: multiple modules: HTTP response splitting forwarding malicious status line

13Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 6.5epss 0.4%
exploitation probability
0.4%top 64% of all CVEs
observed exploitation
nono source reports it
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.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N