High · CVSS 8.2CVE-2026-57228

Suricata smtp/mime: heap out-of-bounds read quoted-printable decoderCVE-2026-57228

Answer in brief

CVE-2026-57228 records a High severity (CVSS 8.2) vulnerability in Suricata smtp/mime: heap out-of-bounds read quoted-printable decoder. The current sources do not mark it as known exploited. The current feed maps OISF/suricata (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 18, 2026Updated Sep 29, 2026Source checked Nov 2, 2026First seen by HOL Sep 18, 2026Material review Sep 29, 2026

Upstream Advisory

Key facts

Risk: High · CVSS 8.2
Exploitation: Not marked as known exploited
Affected software: 2 mapped packages or products
Fix availability: Available

Why this deserves its current priority

CVSS is 8.2. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps OISF/suricata (generic). Check affected ranges and fixed versions before updating.

Affected products and reported versions
Product	Affected versions	Fixed versions
cpe:2.3:a:oisf:suricata::::::::	Not reported	Not reported

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
OISF/suricatageneric	>=7.0.13 <7.0.17	7.0.17

Recommended response

Check inventory. Check lockfiles and deployed manifests for OISF/suricata.
Review the reported fix. Update OISF/suricata to 7.0.17 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Sep 18, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 29, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 18, 2026

Sources and claim methodology

Upstream source 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.

Quoted source text, attributed separately from HOL analysis.