Heap-based buffer overflow in Suricata - CVE-2026-57226
Published: July 22, 2026
Vulnerability identifier: #VU139046
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-57226
CWE-ID: CWE-122
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 a heap-based buffer overflow in SWF decompression depth handling when processing HTTP SWF decompression data. A remote attacker can send specially crafted SWF content to cause a denial of service.
Only deployments with swf-decompression enabled and a non-standard decompression depth configuration are vulnerable.
How to mitigate CVE-2026-57226
Install security update from vendor's website.