CVE-2020-10687: Red Hat JBoss Enterprise Application Platform

Medium severity, CVSS 4.8. EPSS: 1.2% chance of exploitation in the next 30 days.

A flaw was discovered in all versions of Undertow before Undertow 2.2.0.Final, where HTTP request smuggling related to CVE-2017-2666 is possible against HTTP/1.x and HTTP/2 due to permitting invalid characters in an HTTP request. This flaw allows an attacker to poison a web-cache, perform an XSS attack, or obtain sensitive information from request other than their own.

Affected products

• Red Hat JBoss Enterprise Application Platform: affected versions not specified; version 7.2 only; version 7.3 only; version 7.4 only
• Red Hat Single Sign-On: affected versions not specified
• Red Hat Undertow: before 2.2.0 (fixed in 2.2.0)

Published 2020-09-23. Last modified 2026-06-17.