Homepage

HTTP Request Smuggling Affecting tomcat6-log4j package, versions *

Severity

 Recommended
0.0
medium
0
10

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

Exploit Maturity
Proof of Concept
EPSS
39.63% (99th percentile)

Do your applications use this vulnerable package?

In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.

Test your applications
  • Snyk IDSNYK-RHEL10-TOMCAT6LOG4J-18522180
  • published5 Aug 2026
  • disclosed22 Nov 2016
Report a new vulnerability Found a mistake?

Introduced: 22 Nov 2016

CVE-2016-6816  (opens in a new tab)
CWE-444  (opens in a new tab)

How to fix?

There is no fixed version for RHEL:10 tomcat6-log4j.

NVD Description

Note: Versions mentioned in the description apply only to the upstream tomcat6-log4j package and not the tomcat6-log4j package as distributed by RHEL. See How to fix? for RHEL:10 relevant fixed versions and status.

The code in Apache Tomcat 9.0.0.M1 to 9.0.0.M11, 8.5.0 to 8.5.6, 8.0.0.RC1 to 8.0.38, 7.0.0 to 7.0.72, and 6.0.0 to 6.0.47 that parsed the HTTP request line permitted invalid characters. This could be exploited, in conjunction with a proxy that also permitted the invalid characters but with a different interpretation, to inject data into the HTTP response. By manipulating the HTTP response the attacker could poison a web-cache, perform an XSS attack and/or obtain sensitive information from requests other then their own.

References