What’s Vulnerable › Vulnerabilities

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

• Severity: medium (CVSS 5.9 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.6% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-09-18 · updated 2026-09-28
• Weakness: CWE-122

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 products

• OISF suricata: before 7.0.17; from 8.0.0 before 8.0.6 — fixed in 7.0.17, 8.0.6

How to fix

Upgrade to a fixed version: OISF suricata 7.0.17, 8.0.6. Check the vendor advisory for mitigations.

References

• https://github.com/OISF/suricata/commit/82af0aeb7cec39e206a9ca96c4966425eddeaa74
• https://github.com/OISF/suricata/commit/b63224871b0f8b0b1f7b8c22d05ba8a5c5f69fbb
• https://github.com/OISF/suricata/commit/d9fae18432501674338e28bd33e35788c95d4a98
• https://github.com/OISF/suricata/pull/15704
• https://github.com/OISF/suricata/releases/tag/suricata-7.0.17
• https://github.com/OISF/suricata/releases/tag/suricata-8.0.6
• https://github.com/OISF/suricata/security/advisories/GHSA-p33j-r48q-3jcf
• https://redmine.openinfosecfoundation.org/issues/8642

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