Vulnerability · Published Sep 10, 2026 · Assigned by GitHub_M
CVE-2026-46387Suricata http2: decompression bomb can cause denial of service in Suricata
High 7.5
In plain English
A high-severity security flaw in suricata from OISF. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.9% (higher than 59% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
Suricata is a network Intrusion Detection System, Intrusion Prevention System and Network Security Monitoring engine. Prior to versions 7.0.16 and 8.0.5, Suricata's HTTP/2 decompression path could grow the decompressed response-body buffer without an effective upper bound. A crafted HTTP/2 DATA payload using a high compression ratio, such as gzip, deflate, or brotli compressed data, could cause Suricata to allocate excessive memory while decompressing the payload. Versions 7.0.16 and 8.0.5 contain a fix. As a workaround, disable HTTP2.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:13 | suricata | no fix listed | DEBIAN-CVE-2026-46387 |
| Debian:14 | suricata | 1:8.0.5-1 | DEBIAN-CVE-2026-46387 |
| Ubuntu:22.04:LTS | suricata | no fix listed | UBUNTU-CVE-2026-46387 |
| Ubuntu:24.04:LTS | suricata | no fix listed | UBUNTU-CVE-2026-46387 |
| Ubuntu:26.04:LTS | suricata | no fix listed | UBUNTU-CVE-2026-46387 |
| Ubuntu:26.10 | suricata | no fix listed | UBUNTU-CVE-2026-46387 |
Affected products (as reported)
Weakness: CWE-409 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
References
- https://github.com/OISF/suricata/security/advisories/GHSA-45p7-j5wm-8wrx x_refsource_CONFIRM
- https://forum.suricata.io/t/suricata-8-0-5-and-7-0-16-released/6315 x_refsource_MISC
- https://redmine.openinfosecfoundation.org/issues/8513 x_refsource_MISC