CVE-2016-6817: high-severity vulnerability in Apache Tomcat
Published · Updated
E-mail alert when it lands in KEV, gets a public PoC or its score goes up.
21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 7.5epss 7.2%
The HTTP/2 header parser in Apache Tomcat 9.0.0.M1 to 9.0.0.M11 and 8.5.0 to 8.5.6 entered an infinite loop if a header was received that was larger than the available buffer. This made a denial of service attack possible.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected products
Apache Software Foundation · Apache TomcatRelated CVEs — Apache Tomcat
In the same product, most dangerous first.
CVE-2017-12617HIGHCVE-2017-12617EPSS 100.0%KEVCVE-2025-24813CRITICALApache Tomcat: Potential RCE and/or information disclosure and/or information corruption with partial PUTEPSS 99.9%KEVCVE-2017-12615HIGHCVE-2017-12615EPSS 99.7%KEVCVE-2026-34486HIGHApache Tomcat: Fix for CVE-2026-29146 allowed bypass of EncryptInterceptorEPSS 98.5%KEVCVE-2016-8735CRITICALCVE-2016-8735EPSS 90.3%KEVCVE-2018-11784—CVE-2018-11784EPSS 97.7%
References
https://lists.apache.org/thread.html/343558d982879bf88ec20dbf707f8c11255f8e219e81d45c4f8d0551%40%3Cdev.tomcat.apache.org%3Ehttps://lists.apache.org/thread.html/6af47120905aa7d8fe12f42e8ff2284fb338ba141d3b77b8c7cb61b3%40%3Cdev.tomcat.apache.org%3Ehttps://lists.apache.org/thread.html/88855876c33f2f9c532ffb75bfee570ccf0b17ffa77493745af9a17a%40%3Cdev.tomcat.apache.org%3Ehttps://lists.apache.org/thread.html/a9f24571460af003071475b75f18cad81ebcc36fa7c876965a75e32a%40%3Cannounce.tomcat.apache.org%3Ehttps://lists.apache.org/thread.html/b5e3f51d28cd5d9b1809f56594f2cf63dcd6a90429e16ea9f83bbedc%40%3Cdev.tomcat.apache.org%3Ehttps://security.netapp.com/advisory/ntap-20180607-0001/http://www.securityfocus.com/bid/94462http://www.securitytracker.com/id/1037330