Medium severity · published Sep 18, 2026
CVE-2026-57226
Suricata swf: heap buffer overflow in SWF decompression depth handling
5.9
CVSS
0.6%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
High
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.6% · higher than 48% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
SU
suricata · OISF
>= 8.0.0, < 8.0.6; < 7.0.17 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-57226
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-57226
Patch
https://github.com/OISF/suricata/commit/82af0aeb7cec39e206a9ca96c4966425eddeaa74
Patch
https://github.com/OISF/suricata/commit/b63224871b0f8b0b1f7b8c22d05ba8a5c5f69fbb
Patch
https://github.com/OISF/suricata/commit/d9fae18432501674338e28bd33e35788c95d4a98
Patch
https://github.com/OISF/suricata/pull/15704
Release Notes
https://github.com/OISF/suricata/releases/tag/suricata-7.0.17
Release Notes
https://github.com/OISF/suricata/releases/tag/suricata-8.0.6
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