CVE-2020-11020

CriticalCVSS 9.8/10Last modified Jun 17, 2026

Description

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.

Metrics

CVSS 3.1 9.8/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-287

Affected software

Vendor	Product	Versions
faye	Faye	>= 0.5.0, < 1.0.4; >= 1.1.0, < 1.1.3; >= 1.2.0, < 1.2.5

References

https://github.com/faye/faye/commit/65d297d341b607f3cb0b5fa6021a625a991cc30ePatch, Third Party Advisory
https://github.com/faye/faye/security/advisories/GHSA-qpg4-4w7w-2mq5Exploit, Mitigation, Third Party Advisory
https://github.com/faye/faye/commit/65d297d341b607f3cb0b5fa6021a625a991cc30ePatch, Third Party Advisory
https://github.com/faye/faye/security/advisories/GHSA-qpg4-4w7w-2mq5Exploit, Mitigation, Third Party Advisory

Timeline

Published: Apr 29, 2020
Last modified: Jun 17, 2026
NVD status: Modified

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