CVE-2020-1897: Facebook Proxygen

Critical severity, CVSS 9.8. EPSS: 1.1% chance of exploitation in the next 30 days.

A use-after-free is possible due to an error in lifetime management in the request adaptor when a malicious client invokes request error handling in a specific sequence. This issue affects versions of proxygen prior to v2020.05.18.00.

Affected products

• Facebook Proxygen: before 2020.05.18.00 (fixed in 2020.05.18.00)

Published 2020-05-18. Last modified 2026-06-17.