Interpretation Conflict in Suricata - #VU162662
Published: November 9, 2026
Vulnerability identifier: #VU162662
CSH Severity: Low
CVSS v4: 6.3 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N]
CVE-ID: N/A
CWE-ID: CWE-436
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows an unauthenticated remote attacker to bypass host-based detection or inline enforcement in Suricata.
The vulnerability exists due to Suricata's HTTP/2 parser leaving the http.host and http.host.raw inspection buffers empty for requests containing Host without :authority. An unauthenticated remote attacker can send such requests to evade a policy that depends on either buffer when Suricata can inspect the HTTP/2 traffic and the destination accepts Host-only requests.
Affected software
Suricata
Remediation
Install security update from vendor's website.
Suricata - update to 8.0.7