Medium severity · published Sep 18, 2026
CVE-2026-57229
Suricata smtp/mime: incomplete state reset allows detection bypass
5.3
CVSS
0.4%
EPSS
No
On KEV
Description
Suricata is a network Intrusion Detection System, Intrusion Prevention System and Network Security Monitoring engine. From 8.0.0 until 8.0.6, the SMTP MIME parser in rust/src/mime/smtp.rs does not fully reset state when processing Content-Type: message/rfc822 encapsulation. An outer MIME part's encoding or filename state can leak into the inner message, allowing crafted mail to evade detections based on file.data, file.name, or extracted URLs when SMTP MIME decoding is enabled. This issue is fixed in version 8.0.6.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
Low
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 35% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
SU
suricata · OISF
>= 8.0.0, < 8.0.6 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-57229
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-57229
Patch
https://github.com/OISF/suricata/commit/4985eb9daea2f765b6ef59a58fa02e5c71c0a77c
Patch
https://github.com/OISF/suricata/commit/c0215c7e175b0000ef8450928dd1f3453c48379b
Release Notes
https://github.com/OISF/suricata/releases/tag/suricata-8.0.6
Vendor Advisory
https://github.com/OISF/suricata/security/advisories/GHSA-ph5p-pm8r-m355
Permissions Required
https://redmine.openinfosecfoundation.org/issues/8649
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