CVE-2020-11020: Faye Project Faye

Critical severity, CVSS 9.8. EPSS: 1.6% chance of exploitation in the next 30 days.

Faye (NPM, RubyGem) versions greater than 0.5.0 and before 1.0.4, 1.1.3 and 1.2.5, has the potential for authentication bypass in the extension system. The vulnerability allows any client to bypass checks put in place by server-side extensions, by appending extra segments to the message channel. It is patched in versions 1.0.4, 1.1.3 and 1.2.5.

Affected products

• Faye Project Faye: after 0.5.0, before 1.0.4 (fixed in 1.0.4); from 1.1.0, before 1.1.3 (fixed in 1.1.3); from 1.2.0, before 1.2.5 (fixed in 1.2.5)

Published 2020-04-29. Last modified 2026-06-17.