Buffer overflow in Oisf Suricata
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.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 3.7 (Low). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L.
EPSS exploit prediction
EPSS: 0.006 (48.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 48th percentile — 48.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000
Affected products
- Oisf Suricata — versions < 7.0.17, >= 8.0.0, < 8.0.6
Weakness classification (CWE)
References
- github.com/OISF/suricata/commit/82af0aeb7cec39e206a9ca96c4966425eddeaa74 (Patch)
- github.com/OISF/suricata/commit/b63224871b0f8b0b1f7b8c22d05ba8a5c5f69fbb (Patch)
- github.com/OISF/suricata/commit/d9fae18432501674338e28bd33e35788c95d4a98 (Patch)
- github.com/OISF/suricata/pull/15704 (Patch)
- github.com/OISF/suricata/releases/tag/suricata-7.0.17 (Release Notes)
- github.com/OISF/suricata/releases/tag/suricata-8.0.6 (Release Notes)
- github.com/OISF/suricata/security/advisories/GHSA-p33j-r48q-3jcf (Mitigation, Vendor Advisory)
- redmine.openinfosecfoundation.org/issues/8642 (Exploit, Third Party Advisory, Issue Tracking)
Frequently asked questions
- What is CVE-2026-57226?
- CVE-2026-57226 is a low-severity vulnerability in Oisf Suricata, classified under Heap-based Buffer Overflow. CVSS score: 3.7/10. Published 2026-09-18.
- How severe is CVE-2026-57226?
- Low severity. CVSS v3 base score is 3.7 out of 10.