Improper Initialization in Suricata - CVE-2026-57229
Published: July 22, 2026
Vulnerability identifier: #VU139049
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2026-57229
CWE-ID: CWE-665
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 bypass detection rules based on file data, file names, or extracted URLs.
The vulnerability exists due to improper initialization in the SMTP MIME parser when processing Content-Type: message/rfc822 encapsulation. A remote attacker can send a crafted SMTP MIME message to bypass detection rules based on file data, file names, or extracted URLs.
The issue occurs when SMTP MIME decoding is enabled.
How to mitigate CVE-2026-57229
Install security update from vendor's website.