CVE-2019-3563: Facebook Wangle

Critical severity, CVSS 9.8. EPSS: 1.7% chance of exploitation in the next 30 days.

Wangle's LineBasedFrameDecoder contains logic for identifying newlines which incorrectly advances a buffer, leading to a potential underflow. This affects versions of Wangle prior to v2019.04.22.00

Affected products

• Facebook Wangle: before 2019.04.22.00 (fixed in 2019.04.22.00)

Published 2019-04-29. Last modified 2026-06-17.