CVE-2026-57226 Suricata swf: heap buffer overflow in SWF decompression depth handling
A crafted SWF response can trigger a heap buffer overflow and crash Suricata if the non-default swf-decompression feature is enabled with an unsafe depth setting.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-57226?
CVE-2026-57226 is a low-severity vulnerability in Oisf Suricata, published on 18 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 7.0.17 and 8.0.6, HTTP SWF decompression with the non-default swf-decompression feature and an unsafe decompress-depth can use the configured depth when allocating in src/util-file-decompression.c instead of limiting the allocation to the Flash file's actual data requirement. A crafted SWF response can therefore trigger an integer-related heap buffer overflow and crash Suricata; the default disabled feature and default depth are not affected. This issue is fixed in versions 8.0.6 and 7.0.17.
Which versions are affected by CVE-2026-57226?
It affects 1 product.
Products include Oisf Suricata.
How do I fix CVE-2026-57226?
Upgrade to a fixed version.
Is CVE-2026-57226 being exploited?
There is no known exploitation of CVE-2026-57226 in the wild and no public exploit code.
Other vulnerabilities in Oisf Suricata
Sources
Also known as DEBIAN-CVE-2026-57226, GHSA-p33j-r48q-3jcf, UBUNTU-CVE-2026-57226.