Improper handling of highly compressed data in Suricata - CVE-2026-46387
Published: June 3, 2026
Vulnerability identifier: #VU133271
CSH Severity: Medium
CVSS v4.0: 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/E:U/U:Green
CVE-ID: CVE-2026-46387
CWE-ID: CWE-409
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Open Information Security Foundation
Affected software:
Suricata
Suricata
Detailed vulnerability description
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/2 decompression path when processing compressed HTTP/2 DATA payloads. A remote attacker can send a specially crafted compressed payload to cause a denial of service.
The issue can cause excessive memory allocation while decompressing gzip, deflate, or brotli-compressed response bodies.
How to mitigate CVE-2026-46387
Install security update from vendor's website.