CVE-2020-24661: Fedoraproject Fedora

Medium severity, CVSS 5.9. EPSS: 0.9% chance of exploitation in the next 30 days.

GNOME Geary before 3.36.3 mishandles pinned TLS certificate verification for IMAP and SMTP services using invalid TLS certificates (e.g., self-signed certificates) when the client system is not configured to use a system-provided PKCS#11 store. This allows a meddler in the middle to present a different invalid certificate to intercept incoming and outgoing mail.

Affected products

• Fedoraproject Fedora: version 31 only; version 32 only
• Gnome Geary: before 3.36.3 (fixed in 3.36.3)

Published 2020-08-26. Last modified 2026-06-17.