CVE-2019-20786: Pion Dtls

Critical severity, CVSS 9.8. EPSS: 3% chance of exploitation in the next 30 days.

handleIncomingPacket in conn.go in Pion DTLS before 1.5.2 lacks a check for application data with epoch 0, which allows remote attackers to inject arbitrary unencrypted data after handshake completion.

Affected products

• Pion Dtls: before 1.5.2 (fixed in 1.5.2)

Published 2020-04-19. Last modified 2026-06-17.