CVE-2016-8747 Apache Tomcat allows remote attackers to read data that was intended to be associated with a different request

What is CVE-2016-8747?

CVE-2016-8747 is a high-severity vulnerability in Apache Tomcat, published on 14 Mar 2017. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

An information disclosure issue was discovered in Apache Tomcat 8.5.7 to 8.5.9 and 9.0.0.M11 to 9.0.0.M15 in reverse-proxy configurations. Http11InputBuffer.java allows remote attackers to read data that was intended to be associated with a different request.

Weakness: CWE-200

Which versions are affected by CVE-2016-8747?

4 open source packages ship an affected version, including org.apache.tomcat:tomcat. It affects 3 products.

Products include Apache Tomcat, Netapp Oncommand Insight, Netapp Oncommand Shift.

How do I fix CVE-2016-8747?

Upgrade org.apache.tomcat:tomcat to a fixed version for your release line: 8.5.10 or 9.0.0.M16.

Is CVE-2016-8747 being exploited?

There is no known exploitation of CVE-2016-8747 in the wild and no public exploit code.

Other vulnerabilities in Apache Tomcat

• CVE-2025-24813 Apache Tomcat Path Equivalence Exploited Critical 10.0
• CVE-2016-8735 Apache Tomcat Remote Code Execution Exploited Critical 9.8
• CVE-2017-12617 Apache Tomcat Remote Code Execution Exploited High 8.1
• CVE-2017-12615 Apache Tomcat on Windows Remote Code Execution Exploited High 8.1
• CVE-2026-34486 Apache Tomcat Missing Encryption of Sensitive Data Exploited High 7.5

All Apache Tomcat vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-fjwp-r6fm-q6qw.