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Vulnerability · Published Sep 18, 2026 · Assigned by GitHub_M

CVE-2026-57226Suricata swf: heap buffer overflow in SWF decompression depth handling

Low 3.7

In plain English

A low-severity heap buffer overflow 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 0.6% (higher than 49% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)3.7Low
Exploit odds (30 days)0.6%top 51.5% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

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.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:13suricatano fix listedDEBIAN-CVE-2026-57226
Debian:14suricata1:8.0.6-1DEBIAN-CVE-2026-57226
Ubuntu:22.04:LTSsuricatano fix listedUBUNTU-CVE-2026-57226
Ubuntu:24.04:LTSsuricatano fix listedUBUNTU-CVE-2026-57226
Ubuntu:26.04:LTSsuricatano fix listedUBUNTU-CVE-2026-57226

Affected products (as reported)

VendorProductVersions
OISF suricata >= 8.0.0, < 8.0.6< 7.0.17

Weakness: CWE-122, CWE-190 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L

References