Interpretation Conflict in Suricata - #VU162663
Published: November 9, 2026
Vulnerability identifier: #VU162663
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 intended detection or enforcement policies for HTTP/2 requests in Suricata.
The vulnerability exists due to truncation of bracketed IPv6 literals at the first colon when Suricata normalizes the HTTP/2 authority into the http.host buffer. An unauthenticated remote attacker can send a crafted request to evade a policy that inspects visible HTTP/2 traffic and relies on http.host to match a bracketed IPv6 literal.
Affected software
Suricata
Remediation
Install security update from vendor's website.
Suricata - update to 8.0.7