CVE-2026-46387 Suricata http2: decompression bomb can cause denial of service in Suricata
A crafted HTTP/2 payload can cause excessive memory allocation in Suricata, leading to denial of service.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-46387?
CVE-2026-46387 is a high-severity denial of service vulnerability in Oisf Suricata, published on 10 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
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.
Weakness: CWE-409
Which versions are affected by CVE-2026-46387?
It affects 1 product.
Products include Oisf Suricata.
How do I fix CVE-2026-46387?
Upgrade to a fixed version.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-46387 being exploited?
There is no known exploitation of CVE-2026-46387 in the wild and no public exploit code.
Other vulnerabilities in Oisf Suricata
Sources
Also known as DEBIAN-CVE-2026-46387, GHSA-45p7-j5wm-8wrx, UBUNTU-CVE-2026-46387.