CVE-2026-57226: Heap Overflow (CVSS 3.7)

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.

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CVSS v3.1 Score

3.7

LOW

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L

EPSS — Exploit Prediction

0.0059

Probability of exploitation

0.47%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-122 CWE-122

CWE-190 Integer Overflow

References

Other 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

Frequently Asked Questions

What is CVE-2026-57226? +

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. It has a CVSS v3.1 base score of 3.7 (LOW).

How severe is CVE-2026-57226? +

CVE-2026-57226 has a CVSS v3.1 score of 3.7 out of 10, rated LOW. This is a low-severity vulnerability with limited impact. The EPSS score is 0.0059, placing it in the 0th percentile for exploitation probability.

How do I check if I'm vulnerable to CVE-2026-57226? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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