Interpretation Conflict in Suricata - #VU162664
Published: November 9, 2026
Vulnerability identifier: #VU162664
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/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 HTTP/2 header inspection and evade matching intrusion prevention actions in Suricata.
The vulnerability exists due to incorrect parsing of the HPACK header block when fragmented HTTP/2 HEADERS frames contain PRIORITY or PADDED metadata. An unauthenticated remote attacker can send these crafted frames to bypass header-derived rules and logging for the affected request and subsequent requests on the same connection.
Affected software
Suricata
Remediation
Install security update from vendor's website.
Suricata - update to 8.0.7