Vulnerability · Published Sep 18, 2026 · Assigned by GitHub_M
CVE-2026-57229Suricata smtp/mime: incomplete state reset allows detection bypass
Medium 5.3
In plain English
A medium-severity security flaw in suricata from OISF. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 36% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:13 | suricata | no fix listed | DEBIAN-CVE-2026-57229 |
| Debian:14 | suricata | 1:8.0.6-1 | DEBIAN-CVE-2026-57229 |
| Ubuntu:22.04:LTS | suricata | no fix listed | UBUNTU-CVE-2026-57229 |
| Ubuntu:24.04:LTS | suricata | no fix listed | UBUNTU-CVE-2026-57229 |
| Ubuntu:26.04:LTS | suricata | no fix listed | UBUNTU-CVE-2026-57229 |
Affected products (as reported)
Weakness: CWE-665 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
References
- https://github.com/OISF/suricata/security/advisories/GHSA-ph5p-pm8r-m355 x_refsource_CONFIRM
- https://github.com/OISF/suricata/commit/4985eb9daea2f765b6ef59a58fa02e5c71c0a77c x_refsource_MISC
- https://github.com/OISF/suricata/commit/c0215c7e175b0000ef8450928dd1f3453c48379b x_refsource_MISC
- https://github.com/OISF/suricata/releases/tag/suricata-8.0.6 x_refsource_MISC
- https://redmine.openinfosecfoundation.org/issues/8649 x_refsource_MISC