Out-of-bounds read in Suricata - CVE-2026-57228
Published: July 22, 2026
Vulnerability identifier: #VU139048
CSH Severity: High
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber
CVE-ID: CVE-2026-57228
CWE-ID: CWE-125
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Open Information Security Foundation
Affected software:
Suricata
Suricata
Detailed vulnerability description
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to out-of-bounds read in the SMTP MIME quoted-printable decoder when processing a quoted-printable escape sequence split across traffic chunks where the next chunk is only one byte long. A remote attacker can send specially crafted SMTP MIME traffic to cause a denial of service.
How to mitigate CVE-2026-57228
Install security update from vendor's website.