---
id: CVE-2026-57228
title: >-
  Suricata is a network Intrusion Detection System, Intrusion Prevention System
  and Network Security Monitoring engine
summary: >-
  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 hea…
severity: high
cvss: 8.2
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H'
cwe:
  - CWE-125
vendor: OISF
product: suricata
affected:
  - 'suricata >= 7.0.13, < 7.0.17'
published: '2026-09-18'
updated: '2026-09-23'
sourceUpdated: '2026-09-23T18:12:04.247'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-57228'
references:
  - url: >-
      https://github.com/OISF/suricata/commit/19880f9d5bbe2b8f8e8867a577848dce2b532c86
    label: security-advisories@github.com
  - url: 'https://github.com/OISF/suricata/releases/tag/suricata-7.0.17'
    label: security-advisories@github.com
  - url: 'https://github.com/OISF/suricata/security/advisories/GHSA-qxm4-q7vx-7xj4'
    label: security-advisories@github.com
  - url: 'https://redmine.openinfosecfoundation.org/issues/8608'
    label: security-advisories@github.com
tags:
  - nvd
  - cve.org
epss: 0.0057
epssPercentile: 0.44818
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-09-21T19:48:41.391355Z'
ingestedAt: '2026-09-18T20:51:25.801Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.