What’s Vulnerable › Vulnerabilities

CVE-2020-10687

• Severity: medium (CVSS 4.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2020-09-23 · updated 2026-06-17
• Weakness: CWE-444

Description

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 EAP: 7.2, 7.3, 7.4
• Red Hat Single Sign-On: all versions
• Red Hat undertow: before 2.2.0 — fixed in 2.2.0

How to fix

Upgrade to a fixed version: Red Hat undertow 2.2.0. Check the vendor advisory for mitigations.

References

• https://bugzilla.redhat.com/show_bug.cgi?id=1785049
• https://lists.apache.org/thread.html/r6603513ea8afbf6857fd77ca5888ec8385d0af493baa4250e28c351c%40%3Cdev.cxf.apache.org%3E
• https://security.netapp.com/advisory/ntap-20220210-0015/
• https://bugzilla.redhat.com/show_bug.cgi?id=1785049
• https://lists.apache.org/thread.html/r6603513ea8afbf6857fd77ca5888ec8385d0af493baa4250e28c351c%40%3Cdev.cxf.apache.org%3E
• https://security.netapp.com/advisory/ntap-20220210-0015/

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