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CVE-2026-57228Suricata smtp/mime: heap out-of-bounds read quoted-printable decoder
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.
9.1 CRITICALEPSS 0.42%Not in KEVNVD: Analyzed
Overview
Severity
| Score | Severity | Version | Vector String |
|---|---|---|---|
| 9.1 | CRITICAL | 3.1NVD | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H |
| 8.2 | HIGH | 3.1GitHub_M (CNA) | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H |
Details
- CVE ID
- CVE-2026-57228
- Status
- Analyzed
- Assigner (CNA)
- GitHub_M
- Published
- Sep 18, 2026
- Last modified
- 2026-09-29 12:47 UTC
- Weaknesses
- CWE-125 · Out-of-bounds Read
Affected Products
As published by the CNA in the CVE record.
OISFsuricata1 version range
- >= 7.0.13, < 7.0.17
References
- github.com https://github.com/OISF/suricata/commit/19880f9d5bbe2b8f8e8867a577848dce2b532c86
- github.com https://github.com/OISF/suricata/releases/tag/suricata-7.0.17
- github.com https://github.com/OISF/suricata/security/advisories/GHSA-qxm4-q7vx-7xj4
- redmine.openinfosecfoundation.org https://redmine.openinfosecfoundation.org/issues/8608