imaplib STARTTLS serves plaintext bytes buffered before the handshake as if they came over TLS

Medium 1 CVE Published Nov 12, 2026 at 1:03 AM UTC

Summary

Mariner

Release Notes

Nov 12, 2026 at 1:03 AM UTC
Published by Microsoft Security Response Center
The publication date reported by the vendor.
Nov 12, 2026 at 8:45 AM UTC
Added to SecurityAlert
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