--- title: "CVE-2019-0199: Apache Tomcat vulnerability | CubePath" description: "The HTTP/2 implementation in Apache Tomcat 9.0.0.M1 to 9.0.14 and 8.5.0 to 8.5.37 accepted streams with excessive numbers of SETTINGS frames and also…" language: en source: https://cubepath.com/security/cve/CVE-2019-0199 --- # CVE-2019-0199: Apache Tomcat vulnerability | CubePath ## Description The HTTP/2 implementation in Apache Tomcat 9.0.0.M1 to 9.0.14 and 8.5.0 to 8.5.37 accepted streams with excessive numbers of SETTINGS frames and also permitted clients to keep streams open without reading/writing request/response data. By keeping streams open for requests that utilised the Servlet API's blocking I/O, clients were able to cause server-side threads to block eventually leading to thread exhaustion and a DoS. Official description from the CVE record, published by apache. Copyright © 1999-2026 The MITRE Corporation. See [/security/cve/legal](https://cubepath.com/security/cve/legal) for the CVE license. [View the record on cve.org](https://www.cve.org/CVERecord?id=CVE-2019-0199) ## Key data ### EPSS Exploit Prediction Scoring System by FIRST: an estimate of the probability that exploitation activity will be observed in the next 30 days. Score 0.72855 (72.9% probability) Percentile 99.5% Scores of Nov 10, 2026 Model v2026.06.15 ## Affected products Products listed in the CVE record, as the CNA published them. - Apache Tomcat - affected: Apache Tomcat 9.0.0.M1 to 9.0.14, 8.5.0 to 8.5.37 ## References Links listed in the CVE record. They lead to other sites, which CubePath does not control. - [lists.apache.org/thread.html/e1b0b273b6e8ddcc72c9023bc2394b…](https://lists.apache.org/thread.html/e1b0b273b6e8ddcc72c9023bc2394b1276fc72664144bf21d0a87995%40%3Cannounce.tomcat.apache.org%3E) - [\[tomcat-dev\] 20190413 svn commit: r1857494 \[17/20\] - in /tomcat/site/trunk: ./ docs/ xdocs/](https://lists.apache.org/thread.html/88855876c33f2f9c532ffb75bfee570ccf0b17ffa77493745af9a17a%40%3Cdev.tomcat.apache.org%3E) (lists.apache.org) mailing-list - [\[tomcat-dev\] 20190413 svn commit: r1857496 \[3/4\] - in /tomcat/site/trunk: ./ docs/ xdocs/](https://lists.apache.org/thread.html/e85e83e9954f169bbb77b44baae5a33d8de878df557bb32b7f793661%40%3Cdev.tomcat.apache.org%3E) (lists.apache.org) mailing-list - [\[tomcat-dev\] 20190415 svn commit: r1857582 \[18/22\] - in /tomcat/site/trunk: docs/ xdocs/stylesheets/](https://lists.apache.org/thread.html/1dd0a59c1295cc08ce4c9e7edae5ad2268acc9ba55adcefa0532e5ba%40%3Cdev.tomcat.apache.org%3E) (lists.apache.org) mailing-list - [\[tomcat-dev\] 20190415 svn commit: r1857582 \[19/22\] - in /tomcat/site/trunk: docs/ xdocs/stylesheets/](https://lists.apache.org/thread.html/6af47120905aa7d8fe12f42e8ff2284fb338ba141d3b77b8c7cb61b3%40%3Cdev.tomcat.apache.org%3E) (lists.apache.org) mailing-list - [security.netapp.com/advisory/ntap-20190419-0001](https://security.netapp.com/advisory/ntap-20190419-0001/) - [\[tomee-commits\] 20190528 \[jira\] \[Closed\] (TOMEE-2497) Upgrade Tomcat in TomEE 7.0.x/7.1.x/8.0.x for CVE-2019-0199](https://lists.apache.org/thread.html/e56886e1bac9319ecce81b3612dd7a1a43174a3a741a1c805e16880e%40%3Ccommits.tomee.apache.org%3E) (lists.apache.org) mailing-list - [\[tomcat-users\] 20190620 Re: \[EXTERNAL\] \[SECURITY\] CVE-2019-10072 Apache Tomcat HTTP/2 DoS](https://lists.apache.org/thread.html/9fe25f98bac6d66f8a663a15c37a98bc2d8f8bbed1d408791a3e4067%40%3Cusers.tomcat.apache.org%3E) (lists.apache.org) mailing-list - [\[tomcat-dev\] 20190620 \[SECURITY\] CVE-2019-10072 Apache Tomcat HTTP/2 DoS](https://lists.apache.org/thread.html/4c438fa4c78cb1ce8979077f668ab7145baf83e7c59f2faf7eccf094%40%3Cdev.tomcat.apache.org%3E) (lists.apache.org) mailing-list - [\[announce\] 20190620 \[SECURITY\] CVE-2019-10072 Apache Tomcat HTTP/2 DoS](https://lists.apache.org/thread.html/cf4eb2bd2083cebb3602a293c653f9a7faa96c86f672c876f25b37ef%40%3Cannounce.apache.org%3E) (lists.apache.org) mailing-list - [\[tomcat-announce\] 20190620 \[SECURITY\] CVE-2019-10072 Apache Tomcat HTTP/2 DoS](https://lists.apache.org/thread.html/df1a2c1b87c8a6c500ecdbbaf134c7f1491c8d79d98b48c6b9f0fa6a%40%3Cannounce.tomcat.apache.org%3E) (lists.apache.org) mailing-list - [\[tomcat-dev\] 20190620 svn commit: r1861711 - in /tomcat/site/trunk: docs/security-8.html docs/security-9.html xdocs/security-8.xml xdocs/security-9.xml](https://lists.apache.org/thread.html/158ab719cf60448ddbb074798f09152fdb572fc8f781e70a56118d1a%40%3Cdev.tomcat.apache.org%3E) (lists.apache.org) mailing-list - [\[tomcat-users\] 20190620 \[SECURITY\] CVE-2019-10072 Apache Tomcat HTTP/2 DoS](https://lists.apache.org/thread.html/e87733036e8c84ea648cdcdca3098f3c8a897e2652c33062b2b1535c%40%3Cusers.tomcat.apache.org%3E) (lists.apache.org) mailing-list - [\[tomcat-dev\] 20190620 \[SECURITY\]\[CORRECTION\] CVE-2019-10072 Apache Tomcat HTTP/2 DoS](https://lists.apache.org/thread.html/a7a201bd23e67fd3326c9b22b814dd0537d3270b3b54a768e2e7ef50%40%3Cdev.tomcat.apache.org%3E) (lists.apache.org) mailing-list - [\[tomcat-announce\] 20190620 \[SECURITY\]\[CORRECTION\] CVE-2019-10072 Apache Tomcat HTTP/2 DoS](https://lists.apache.org/thread.html/dddb3590bac28fbe89f69f5ccbe26283d014ddc691abdd042de14600%40%3Cannounce.tomcat.apache.org%3E) (lists.apache.org) mailing-list - [\[tomcat-users\] 20190620 \[SECURITY\]\[CORRECTION\] CVE-2019-10072 Apache Tomcat HTTP/2 DoS](https://lists.apache.org/thread.html/7bb193bc68b28d21ff1c726fd38bea164deb6333b59eec2eb3661da6%40%3Cusers.tomcat.apache.org%3E) (lists.apache.org) mailing-list - [\[announce\] 20190620 \[SECURITY\]\[CORRECTION\] CVE-2019-10072 Apache Tomcat HTTP/2 DoS](https://lists.apache.org/thread.html/ac0185ce240a711b542a55bccf9349ab0c2f343d70cf7835e08fabc9%40%3Cannounce.apache.org%3E) (lists.apache.org) mailing-list - [FEDORA-2019-1a3f878d27](https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZQTZ5BJ5F4KV6N53SGNKSW3UY5DBIQ46/) (lists.fedoraproject.org) vendor-advisory - [support.f5.com/csp/article/K17321505](https://support.f5.com/csp/article/K17321505) - [openSUSE-SU-2019:1673](http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00090.html) (lists.opensuse.org) vendor-advisory - [FEDORA-2019-d66febb5df](https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NPHQEL5AQ6LZSZD2Y6TYZ4RC3WI7NXJ3/) (lists.fedoraproject.org) vendor-advisory - [oracle.com/technetwork/security-advisory/cpujul2019-5072835…](https://www.oracle.com/technetwork/security-advisory/cpujul2019-5072835.html) - [107674](http://www.securityfocus.com/bid/107674) (securityfocus.com) vdb-entry - [openSUSE-SU-2019:1723](http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00013.html) (lists.opensuse.org) vendor-advisory - [openSUSE-SU-2019:1808](http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00054.html) (lists.opensuse.org) vendor-advisory - [RHSA-2019:3929](https://access.redhat.com/errata/RHSA-2019:3929) (access.redhat.com) vendor-advisory - [RHSA-2019:3931](https://access.redhat.com/errata/RHSA-2019:3931) (access.redhat.com) vendor-advisory - [DSA-4596](https://www.debian.org/security/2019/dsa-4596) (debian.org) vendor-advisory - [20191229 \[SECURITY\] \[DSA 4596-1\] tomcat8 security update](https://seclists.org/bugtraq/2019/Dec/43) (seclists.org) mailing-list - [oracle.com/security-alerts/cpujan2020.html](https://www.oracle.com/security-alerts/cpujan2020.html) - [\[tomcat-dev\] 20200203 svn commit: r1873527 \[24/30\] - /tomcat/site/trunk/docs/](https://lists.apache.org/thread.html/r6ccee4e849bc77df0840c7f853f6bd09d426f6741247da2b7429d5d9%40%3Cdev.tomcat.apache.org%3E) (lists.apache.org) mailing-list - [\[tomcat-dev\] 20200203 svn commit: r1873527 \[25/30\] - /tomcat/site/trunk/docs/](https://lists.apache.org/thread.html/r3bbb800a816d0a51eccc5a228c58736960a9fffafa581a225834d97d%40%3Cdev.tomcat.apache.org%3E) (lists.apache.org) mailing-list - [\[tomcat-dev\] 20200213 svn commit: r1873980 \[28/34\] - /tomcat/site/trunk/docs/](https://lists.apache.org/thread.html/raba0fabaf4d56d4325ab2aca8814f0b30a237ab83d8106b115ee279a%40%3Cdev.tomcat.apache.org%3E) (lists.apache.org) mailing-list - [\[tomcat-dev\] 20200213 svn commit: r1873980 \[29/34\] - /tomcat/site/trunk/docs/](https://lists.apache.org/thread.html/r48c1444845fe15a823e1374674bfc297d5008a5453788099ea14caf0%40%3Cdev.tomcat.apache.org%3E) (lists.apache.org) mailing-list - [oracle.com/security-alerts/cpuapr2020.html](https://www.oracle.com/security-alerts/cpuapr2020.html) ## Timeline 1. ID reserved Nov 14, 2018 2. Record published Apr 10, 2019 3. Record last updated Aug 4, 2024 ## Look up another CVE ## About CubePath CubePath is a cloud provider with data centers in Europe and the United States. It offers VPS, bare metal servers and DDoS protection. [Cloud VPS](https://cubepath.com/vps) [DDoS protection](https://cubepath.com/ddos-protection) Data from the CVE Program (MITRE), CISA KEV and FIRST EPSS. CVSS is owned by FIRST and used by permission. Not affiliated with or endorsed by MITRE, CISA or FIRST. Data as of Nov 10, 2026, 20:00 UTC. [Sources and licenses](https://cubepath.com/security/cve/legal)