CVE-2022-36937: Facebook Hhvm

Critical severity, CVSS 9.8. EPSS: 0.5% chance of exploitation in the next 30 days.

HHVM 4.172.0 and all prior versions use TLS 1.0 for secure connections when handling tls:// URLs in the stream extension. TLS1.0 has numerous published vulnerabilities and is deprecated. HHVM 4.153.4, 4.168.2, 4.169.2, 4.170.2, 4.171.1, 4.172.1, 4.173.0 replaces TLS1.0 with TLS1.3. Applications that call stream_socket_server or stream_socket_client functions with a URL starting with tls:// are affected.

Affected products

• Facebook Hhvm: before 4.153.4 (fixed in 4.153.4); from 4.154.0, before 4.168.2 (fixed in 4.168.2); from 4.169.0, before 4.169.2 (fixed in 4.169.2); from 4.170.0, before 4.170.2 (fixed in 4.170.2); version 4.171.0 only; version 4.172.0 only

Published 2023-05-10. Last modified 2026-06-17.