CVE-2019-3565: Facebook Thrift

High severity, CVSS 7.5. EPSS: 2.8% chance of exploitation in the next 30 days.

Legacy C++ Facebook Thrift servers (using cpp instead of cpp2) would not error upon receiving messages with containers of fields of unknown type. As a result, malicious clients could send short messages which would take a long time for the server to parse, potentially leading to denial of service. This issue affects Facebook Thrift prior to v2019.05.06.00.

Affected products

• Facebook Thrift: before 2019.05.06.00 (fixed in 2019.05.06.00)

Published 2019-05-06. Last modified 2026-06-17.