Improper handling of highly compressed data in Suricata - #VU152933
Published: September 30, 2026
Vulnerability identifier: #VU152933
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: N/A
CWE-ID: CWE-409
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to improper handling of highly compressed data in the HTTP/1 and HTTP/2 Brotli body decoder when processing crafted cleartext or decrypted HTTP requests. A remote attacker can send a Brotli-encoded request body that forces large decoder memory allocations to cause a denial of service.
HTTP parsing is enabled by default.
Affected software
Suricata
Remediation
Install security update from vendor's website.
Suricata - update to 8.0.7