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jstedfast CVE debriefs

These pages are published after PatchSiren validates generated defensive summaries against stored public CVE and source evidence.

MEDIUM jstedfast CVE published 2026-04-24

CVE-2026-41319

CVE-2026-41319 is a STARTTLS response-injection issue in MailKit versions prior to 4.16.0. A man-in-the-middle can place attacker-controlled protocol responses into the plaintext phase, and those bytes may be treated as trusted after the connection upgrades to TLS. The practical result is authentication integrity loss, including the ability to downgrade SASL mechanism selection (for example, steering a cl [truncated]