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Vulnerability record · CVE-2026-57228 · published 18 September 2026

CVE-2026-57228: Out-of-bounds read vulnerability

Suricata is a network Intrusion Detection System, Intrusion Prevention System and Network Security Monitoring engine. From 7.0.13 until 7.0.17, the SMTP MIME quoted-printable decoder in src/util-decode-mime.c can read one byte past a heap buffer when a quoted-printable escape sequence is split across traffic chunks and the following chunk contains exactly one byte. Crafted SMTP traffic can trigger the out-of-bounds read and crash Suricata when decode-quoted-printable MIME decoding is enabled. This issue is fixed in version 7.0.17.

8.2 CVSS 3.1 High EPSS 0.57% · top 55.1% CWE-125 · Out-of-bounds read Undergoing Analysis
8.2CVSS 3.1 base score
0.57%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
4References
23 Sep 2026Last modified by NVD

Description

Suricata is a network Intrusion Detection System, Intrusion Prevention System and Network Security Monitoring engine. From 7.0.13 until 7.0.17, the SMTP MIME quoted-printable decoder in src/util-decode-mime.c can read one byte past a heap buffer when a quoted-printable escape sequence is split across traffic chunks and the following chunk contains exactly one byte. Crafted SMTP traffic can trigger the out-of-bounds read and crash Suricata when decode-quoted-printable MIME decoding is enabled. This issue is fixed in version 7.0.17.

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

References

LinkTags
https://github.com/OISF/suricata/commit/19880f9d5bbe2b8f8e8867a577848dce2b532c86
https://github.com/OISF/suricata/releases/tag/suricata-7.0.17
https://github.com/OISF/suricata/security/advisories/GHSA-qxm4-q7vx-7xj4
https://redmine.openinfosecfoundation.org/issues/8608

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Source: NIST National Vulnerability Database (record CVE-2026-57228), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.