OISF Suricata up to 7.0.16 SMTP MIME Quoted-Printable Decoder src/util-decode-mime.c out-of-bounds

Summaryinfo

A vulnerability classified as critical has been found in OISF Suricata up to 7.0.16. Impacted is an unknown function of the file src/util-decode-mime.c of the component SMTP MIME Quoted-Printable Decoder. The manipulation leads to out-of-bounds. This vulnerability is traded as CVE-2026-57228. It is possible to initiate the attack remotely. There is no exploit available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, has been found in OISF Suricata up to 7.0.16. This issue affects some unknown processing of the file src/util-decode-mime.c of the component SMTP MIME Quoted-Printable Decoder. The manipulation with an unknown input leads to a out-of-bounds vulnerability. Using CWE to declare the problem leads to CWE-125. The product reads data past the end, or before the beginning, of the intended buffer. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

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.

It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2026-57228 since 06/24/2026. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details of the vulnerability are known, but there is no available exploit.

Upgrading to version 7.0.17 eliminates this vulnerability.

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Productinfo

Vendor

• OISF

Name

• Suricata

Version

• 7.0.0
• 7.0.1
• 7.0.2
• 7.0.3
• 7.0.4
• 7.0.5
• 7.0.6
• 7.0.7
• 7.0.8
• 7.0.9
• 7.0.10
• 7.0.11
• 7.0.12
• 7.0.13
• 7.0.14
• 7.0.15
• 7.0.16

License

• open-source

Website

• Product: https://github.com/OISF/suricata/

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