Jstedfast maintains MimeKit, a widely embedded email-parsing library for .NET applications that handles message construction and serialization across a distributed ecosystem of mail clients and servers. The library's observed vulnerability pattern centers on improper neutralization of control sequences and injection-class weaknesses, reflecting the parsing complexity inherent to MIME message handling and the risk that a single flaw in email-message processing can propagate downstream to every application that depends on it. Current severity, exploitation, and exposure counts are shown alongside this summary.
The number and severity of CVEs published that impact products developed by Jstedfast over time
Signals from CVEs in this vendor scope (2 CVEs).
2 CVEs · Highest risk first
| CVE | Published | CVSS | Risk | KEV | Exploit |
|---|---|---|---|---|---|
CVE-2026-41319MEDIUM MailKit is a cross-platform mail client library built on top of MimeKit. A STARTTLS Response Injection vulnerability in versions prior to 4.16.0 allows a Man-in-the-Middle attacker | Apr 24, 2026 | 5.9 | 24 | NO | NO |
CVE-2026-30227MEDIUM MimeKit is a C# library which may be used for the creation and parsing of messages using the Multipurpose Internet Mail Extension (MIME), as defined by numerous IETF specifications | Mar 6, 2026 | 5.3 | 21 | NO | NO |
Signals from CVEs in this vendor scope (2 CVEs).
An overview of all social media posts that mention a CVE ID that affects a product developed by Jstedfast.
Media articles that mention a CVE ID that affects a product developed by Jstedfast — matched by CVE ID, not by vendor name.