The fix for CVE-2019-0199 was incomplete and did not address HTTP/2 connection window…
Priority HIGH 71CWE-667Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- Partial Red Hat: 4 fixed, 3 without a fix
Attack profile from CVSS 3.0 · NVD. Fix status from CNA, GitHub and Red Hat. Impact type from CWE-667 and the CVSS impact.
Summary
The fix for CVE-2019-0199 was incomplete and did not address HTTP/2 connection window exhaustion on write in Apache Tomcat versions 9.0.0.M1 to 9.0.19 and 8.5.0 to 8.5.40 . By not sending WINDOW_UPDATE messages for the connection window (stream 0) clients were able to cause server-side threads to block eventually leading to thread exhaustion and a DoS.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.72988 99th percentileScored 2026-11-07
Fix Partial org.apache.tomcat.embed:tomcat-embed-core (Maven): 9.0.20, 8.5.41Red Hat: 2 advisoriesRed Hat: 4 fixed, 3 without a fix
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | Apache Tomcat | Apache Tomcat 9.0.0.M1 to 9.0.19, 8.5.0 to 8.5.40 | — | No fix listed | CNA |
| — | org.apache.tomcat.embed:tomcat-embed-core (Maven) | 9.0.0.M1 to before 9.0.20 | 9.0.20 | Patch available | GHSA-q4hg-rmq2-52q9 |
| — | org.apache.tomcat.embed:tomcat-embed-core (Maven) | 8.5.0 to before 8.5.41 | 8.5.41 | Patch available | GHSA-q4hg-rmq2-52q9 |
- Apache Tomcat Vendor— Affected Apache Tomcat 9.0.0.M1 to 9.0.19, 8.5.0 to 8.5.40 Fixed in — No fix listed CNA
- org.apache.tomcat.embed:tomcat-embed-core (Maven) Vendor— Affected 9.0.0.M1 to before 9.0.20 Fixed in 9.0.20 Patch available GHSA-q4hg-rmq2-52q9
- org.apache.tomcat.embed:tomcat-embed-core (Maven) Vendor— Affected 8.5.0 to before 8.5.41 Fixed in 8.5.41 Patch available GHSA-q4hg-rmq2-52q9
CPE configurations NVD · 28
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:* | 8.5.0 – 8.5.40; 9.0.1 – 9.0.19 | Vulnerable | Apache |
| cpe:2.3:a:apache:tomcat:9.0.0:milestone1:*:*:*:*:*:* | 9.0.0 milestone1 | Vulnerable | Apache |
| cpe:2.3:a:apache:tomcat:9.0.0:milestone10:*:*:*:*:*:* | 9.0.0 milestone10 | Vulnerable | Apache |
| cpe:2.3:a:apache:tomcat:9.0.0:milestone11:*:*:*:*:*:* | 9.0.0 milestone11 | Vulnerable | Apache |
| cpe:2.3:a:apache:tomcat:9.0.0:milestone12:*:*:*:*:*:* | 9.0.0 milestone12 | Vulnerable | Apache |
| cpe:2.3:a:apache:tomcat:9.0.0:milestone13:*:*:*:*:*:* | 9.0.0 milestone13 | Vulnerable | Apache |
| cpe:2.3:a:apache:tomcat:9.0.0:milestone14:*:*:*:*:*:* | 9.0.0 milestone14 | Vulnerable | Apache |
| cpe:2.3:a:apache:tomcat:9.0.0:milestone15:*:*:*:*:*:* | 9.0.0 milestone15 | Vulnerable | Apache |
| cpe:2.3:a:apache:tomcat:9.0.0:milestone16:*:*:*:*:*:* | 9.0.0 milestone16 | Vulnerable | Apache |
| cpe:2.3:a:apache:tomcat:9.0.0:milestone17:*:*:*:*:*:* | 9.0.0 milestone17 | Vulnerable | Apache |
- cpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:* Versions 8.5.0 – 8.5.40; 9.0.1 – 9.0.19 Vulnerable ·Apache
- cpe:2.3:a:apache:tomcat:9.0.0:milestone1:*:*:*:*:*:* Versions 9.0.0 milestone1 Vulnerable ·Apache
- cpe:2.3:a:apache:tomcat:9.0.0:milestone10:*:*:*:*:*:* Versions 9.0.0 milestone10 Vulnerable ·Apache
- cpe:2.3:a:apache:tomcat:9.0.0:milestone11:*:*:*:*:*:* Versions 9.0.0 milestone11 Vulnerable ·Apache
- cpe:2.3:a:apache:tomcat:9.0.0:milestone12:*:*:*:*:*:* Versions 9.0.0 milestone12 Vulnerable ·Apache
- cpe:2.3:a:apache:tomcat:9.0.0:milestone13:*:*:*:*:*:* Versions 9.0.0 milestone13 Vulnerable ·Apache
- cpe:2.3:a:apache:tomcat:9.0.0:milestone14:*:*:*:*:*:* Versions 9.0.0 milestone14 Vulnerable ·Apache
- cpe:2.3:a:apache:tomcat:9.0.0:milestone15:*:*:*:*:*:* Versions 9.0.0 milestone15 Vulnerable ·Apache
- cpe:2.3:a:apache:tomcat:9.0.0:milestone16:*:*:*:*:*:* Versions 9.0.0 milestone16 Vulnerable ·Apache
- cpe:2.3:a:apache:tomcat:9.0.0:milestone17:*:*:*:*:*:* Versions 9.0.0 milestone17 Vulnerable ·Apache
Show 18 more CPE
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:apache:tomcat:9.0.0:milestone18:*:*:*:*:*:* | 9.0.0 milestone18 | Vulnerable | Apache |
| cpe:2.3:a:apache:tomcat:9.0.0:milestone19:*:*:*:*:*:* | 9.0.0 milestone19 | Vulnerable | Apache |
| cpe:2.3:a:apache:tomcat:9.0.0:milestone2:*:*:*:*:*:* | 9.0.0 milestone2 | Vulnerable | Apache |
| cpe:2.3:a:apache:tomcat:9.0.0:milestone20:*:*:*:*:*:* | 9.0.0 milestone20 | Vulnerable | Apache |
| cpe:2.3:a:apache:tomcat:9.0.0:milestone21:*:*:*:*:*:* | 9.0.0 milestone21 | Vulnerable | Apache |
| cpe:2.3:a:apache:tomcat:9.0.0:milestone22:*:*:*:*:*:* | 9.0.0 milestone22 | Vulnerable | Apache |
| cpe:2.3:a:apache:tomcat:9.0.0:milestone23:*:*:*:*:*:* | 9.0.0 milestone23 | Vulnerable | Apache |
| cpe:2.3:a:apache:tomcat:9.0.0:milestone24:*:*:*:*:*:* | 9.0.0 milestone24 | Vulnerable | Apache |
| cpe:2.3:a:apache:tomcat:9.0.0:milestone25:*:*:*:*:*:* | 9.0.0 milestone25 | Vulnerable | Apache |
| cpe:2.3:a:apache:tomcat:9.0.0:milestone26:*:*:*:*:*:* | 9.0.0 milestone26 | Vulnerable | Apache |
| cpe:2.3:a:apache:tomcat:9.0.0:milestone27:*:*:*:*:*:* | 9.0.0 milestone27 | Vulnerable | Apache |
| cpe:2.3:a:apache:tomcat:9.0.0:milestone3:*:*:*:*:*:* | 9.0.0 milestone3 | Vulnerable | Apache |
| cpe:2.3:a:apache:tomcat:9.0.0:milestone4:*:*:*:*:*:* | 9.0.0 milestone4 | Vulnerable | Apache |
| cpe:2.3:a:apache:tomcat:9.0.0:milestone5:*:*:*:*:*:* | 9.0.0 milestone5 | Vulnerable | Apache |
| cpe:2.3:a:apache:tomcat:9.0.0:milestone6:*:*:*:*:*:* | 9.0.0 milestone6 | Vulnerable | Apache |
| cpe:2.3:a:apache:tomcat:9.0.0:milestone7:*:*:*:*:*:* | 9.0.0 milestone7 | Vulnerable | Apache |
| cpe:2.3:a:apache:tomcat:9.0.0:milestone8:*:*:*:*:*:* | 9.0.0 milestone8 | Vulnerable | Apache |
| cpe:2.3:a:apache:tomcat:9.0.0:milestone9:*:*:*:*:*:* | 9.0.0 milestone9 | Vulnerable | Apache |
- cpe:2.3:a:apache:tomcat:9.0.0:milestone18:*:*:*:*:*:* Versions 9.0.0 milestone18 Vulnerable ·Apache
- cpe:2.3:a:apache:tomcat:9.0.0:milestone19:*:*:*:*:*:* Versions 9.0.0 milestone19 Vulnerable ·Apache
- cpe:2.3:a:apache:tomcat:9.0.0:milestone2:*:*:*:*:*:* Versions 9.0.0 milestone2 Vulnerable ·Apache
- cpe:2.3:a:apache:tomcat:9.0.0:milestone20:*:*:*:*:*:* Versions 9.0.0 milestone20 Vulnerable ·Apache
- cpe:2.3:a:apache:tomcat:9.0.0:milestone21:*:*:*:*:*:* Versions 9.0.0 milestone21 Vulnerable ·Apache
- cpe:2.3:a:apache:tomcat:9.0.0:milestone22:*:*:*:*:*:* Versions 9.0.0 milestone22 Vulnerable ·Apache
- cpe:2.3:a:apache:tomcat:9.0.0:milestone23:*:*:*:*:*:* Versions 9.0.0 milestone23 Vulnerable ·Apache
- cpe:2.3:a:apache:tomcat:9.0.0:milestone24:*:*:*:*:*:* Versions 9.0.0 milestone24 Vulnerable ·Apache
- cpe:2.3:a:apache:tomcat:9.0.0:milestone25:*:*:*:*:*:* Versions 9.0.0 milestone25 Vulnerable ·Apache
- cpe:2.3:a:apache:tomcat:9.0.0:milestone26:*:*:*:*:*:* Versions 9.0.0 milestone26 Vulnerable ·Apache
- cpe:2.3:a:apache:tomcat:9.0.0:milestone27:*:*:*:*:*:* Versions 9.0.0 milestone27 Vulnerable ·Apache
- cpe:2.3:a:apache:tomcat:9.0.0:milestone3:*:*:*:*:*:* Versions 9.0.0 milestone3 Vulnerable ·Apache
- cpe:2.3:a:apache:tomcat:9.0.0:milestone4:*:*:*:*:*:* Versions 9.0.0 milestone4 Vulnerable ·Apache
- cpe:2.3:a:apache:tomcat:9.0.0:milestone5:*:*:*:*:*:* Versions 9.0.0 milestone5 Vulnerable ·Apache
- cpe:2.3:a:apache:tomcat:9.0.0:milestone6:*:*:*:*:*:* Versions 9.0.0 milestone6 Vulnerable ·Apache
- cpe:2.3:a:apache:tomcat:9.0.0:milestone7:*:*:*:*:*:* Versions 9.0.0 milestone7 Vulnerable ·Apache
- cpe:2.3:a:apache:tomcat:9.0.0:milestone8:*:*:*:*:*:* Versions 9.0.0 milestone8 Vulnerable ·Apache
- cpe:2.3:a:apache:tomcat:9.0.0:milestone9:*:*:*:*:*:* Versions 9.0.0 milestone9 Vulnerable ·Apache
Remediation
- Fix · GHSA-q4hg-rmq2-52q9 org.apache.tomcat.embed:tomcat-embed-core (Maven) Fixed in 9.0.20 Advisory →
- Fix · GHSA-q4hg-rmq2-52q9 org.apache.tomcat.embed:tomcat-embed-core (Maven) Fixed in 8.5.41 Advisory →
Red Hat 2 advisories
- RHSA-2019:3929 Released 2019-11-20 · Red Hat rating ImportantRed Hat JBoss Web Server 5.2 security release
- Red Hat JBoss Web Server 5.2 for RHEL 6 Server jws5-ecj-4.12.0-1.redhat_1.1.el6jws, jws5-javapackages-tools-3.4.1-5.15.11.el6jws, jws5-jboss-logging-3.3.2-1.Final_redhat_00001.1.el6jws +16
- Red Hat JBoss Web Server 5.2 for RHEL 7 Server jws5-ecj-4.12.0-1.redhat_1.1.el7jws, jws5-javapackages-tools-3.4.1-5.15.11.el7jws, jws5-jboss-logging-3.3.2-1.Final_redhat_00001.1.el7jws +16
- Red Hat JBoss Web Server 5.2 for RHEL 8 jws5-ecj-4.12.0-1.redhat_1.1.el8jws, jws5-javapackages-tools-3.4.1-5.15.11.el8jws, jws5-jboss-logging-3.3.2-1.Final_redhat_00001.1.el8jws +16
- RHSA-2019:3931 Released 2019-11-20 · Red Hat rating ImportantRed Hat JBoss Web Server 5.2 security release
- Red Hat JBoss Web Server 5
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat BPM Suite 6 | Affected | No fix planned: Out of support scope |
| Red Hat Enterprise Linux 8 | Affected | No fix planned: Will not fix |
| Red Hat JBoss BRMS 6 | Affected | No fix planned: Out of support scope |
| Red Hat JBoss Web Server 5 | Fixed | RHSA-2019:3931 |
| Red Hat JBoss Web Server 5.2 for RHEL 6 Server | Fixed | RHSA-2019:3929 |
| Red Hat JBoss Web Server 5.2 for RHEL 7 Server | Fixed | RHSA-2019:3929 |
| Red Hat JBoss Web Server 5.2 for RHEL 8 | Fixed | RHSA-2019:3929 |
Not affected: 5 products
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
- Red Hat Fuse 7
- Red Hat JBoss Data Grid 7
- Red Hat JBoss Fuse 6
Timeline
- 2026-10-02 Threatist record created from CVE-2019-10072
- 2026-10-03 Alias added: GHSA-q4hg-rmq2-52q9
- 2026-11-02 CISA SSVC decision points changed
References
Advisory 7
Other 29
- [tomcat-dev] 20200203 svn commit: r1873527 [24/30] - /tomcat/site/trunk/docs/
- [tomcat-dev] 20200203 svn commit: r1873527 [25/30] - /tomcat/site/trunk/docs/
- [tomcat-dev] 20200213 svn commit: r1873980 [28/34] - /tomcat/site/trunk/docs/
- [tomcat-dev] 20200213 svn commit: r1873980 [29/34] - /tomcat/site/trunk/docs/
- https://www.oracle.com/security-alerts/cpuapr2020.html
- https://www.oracle.com/technetwork/security-advisory/cpuoct2019-5072832.html
- https://www.oracle.com/security-alerts/cpujan2020.html
- https://www.oracle.com/security-alerts/cpuoct2020.html
- https://lists.apache.org/thread.html/df1a2c1b87c8a6c500ecdbbaf134c7f1491c8d79d98b48c6b9f0fa6a%40%3Cannounce.tomcat.apache.org%3E
- https://www.synology.com/security/advisory/Synology_SA_19_29
- https://security.netapp.com/advisory/ntap-20190625-0002/
- https://support.f5.com/csp/article/K17321505
- https://www.oracle.com/security-alerts/cpuApr2021.html
- https://github.com/apache/tomcat/commit/0bcd69c9dd8ae0ff424f2cd46de51583510b7f35
- https://github.com/apache/tomcat/commit/7f748eb6bfaba5207c89dbd7d5adf50fae847145
- https://github.com/apache/tomcat/commit/8d14c6f21d29768a39be4b6b9517060dc6606758
- https://github.com/apache/tomcat/commit/ada725a50a60867af3422c8e612aecaeea856a9a
- https://security.netapp.com/advisory/ntap-20190625-0002
- https://tomcat.apache.org/security-8.html
- https://tomcat.apache.org/security-9.html
- https://usn.ubuntu.com/4128-1
- https://usn.ubuntu.com/4128-2
- https://web.archive.org/web/20200227033743/http://www.securityfocus.com/bid/108874
- https://lists.apache.org/thread.html/raba0fabaf4d56d4325ab2aca8814f0b30a237ab83d8106b115ee279a@%3Cdev.tomcat.apache.org%3E
- https://lists.apache.org/thread.html/r6ccee4e849bc77df0840c7f853f6bd09d426f6741247da2b7429d5d9@%3Cdev.tomcat.apache.org%3E
- https://lists.apache.org/thread.html/r48c1444845fe15a823e1374674bfc297d5008a5453788099ea14caf0@%3Cdev.tomcat.apache.org%3E
- https://lists.apache.org/thread.html/r3bbb800a816d0a51eccc5a228c58736960a9fffafa581a225834d97d@%3Cdev.tomcat.apache.org%3E
- https://lists.apache.org/thread.html/df1a2c1b87c8a6c500ecdbbaf134c7f1491c8d79d98b48c6b9f0fa6a@%3Cannounce.tomcat.apache.org%3E
- https://github.com/apache/tomcat
More Apache Tomcat vulnerabilities
- TI-2025-18529 Apache Tomcat: Potential RCE and/or information disclosure and/or information corruption with partial PUT KEVCVSS 3.1CRITICAL 10.0
- TI-2020-01862 Improper privilege management in Apache Tomcat KEVCVSS 3.1CRITICAL 9.8
- TI-2016-07192 Improper access control in Apache Tomcat KEVCVSS 3.1CRITICAL 9.8
- TI-2017-09342 Unrestricted file upload in Apache Tomcat KEVCVSS 3.1HIGH 8.1
- TI-2017-09340 Unrestricted file upload in Apache Tomcat KEVCVSS 3.1HIGH 8.1
- TI-2026-26741 Apache Tomcat: Fix for CVE-2026-29146 allowed bypass of EncryptInterceptor KEVCVSS 3.1HIGH 7.5
Sources
- CVE-2019-10072 · CVE Program
- CVE-2019-10072 · NVD
- FIRST EPSS
- GHSA-q4hg-rmq2-52q9 · GitHub Advisory Database · CC BY 4.0
- CVE-2019-10072 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences