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CVE-2025-31650— Apache Tomcat: DoS via malformed HTTP/2 PRIORITY_UPDATE frame

Quick assessment

Affected
Apache Software Foundation Apache Tomcat
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Apache Tomcat是美国阿帕奇（Apache）基金会的一款轻量级Web应用服务器。用于实现对Servlet和JavaServer Page（JSP）的支持。 Apache Tomcat 9.0.76至9.0.102版本、10.1.10至10.1.39版本和11.0.0-M2至11.0.5版本存在安全漏洞，该漏洞源于对无效HTTP优先级标头的错误处理导致内存泄漏，可能导致拒绝服务。

AI Predicted 5.3 Difficulty: Easy EPSS 59.92% · P99

Public Exploits 1

ExploitDB · 1 EDB-52318 [remote]

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service
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I. Basic Information for CVE-2025-31650

Vulnerability Information
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Vulnerability Title
Apache Tomcat: DoS via malformed HTTP/2 PRIORITY_UPDATE frame
Source: CVE Program / CVE List V5
Vulnerability Description
Improper Input Validation vulnerability in Apache Tomcat. Incorrect error handling for some invalid HTTP priority headers resulted in incomplete clean-up of the failed request which created a memory leak. A large number of such requests could trigger an OutOfMemoryException resulting in a denial of service. This issue affects Apache Tomcat: from 9.0.76 through 9.0.102, from 10.1.10 through 10.1.39, from 11.0.0-M2 through 11.0.5. The following versions were EOL at the time the CVE was created but are known to be affected: 8.5.90 though 8.5.100. Users are recommended to upgrade to version 9.0.104, 10.1.40 or 11.0.6 which fix the issue.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
清理环节不完整
Source: CVE Program / CVE List V5
Vulnerability Title
Apache Tomcat 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Apache Tomcat是美国阿帕奇（Apache）基金会的一款轻量级Web应用服务器。用于实现对Servlet和JavaServer Page（JSP）的支持。 Apache Tomcat 9.0.76至9.0.102版本、10.1.10至10.1.39版本和11.0.0-M2至11.0.5版本存在安全漏洞，该漏洞源于对无效HTTP优先级标头的错误处理导致内存泄漏，可能导致拒绝服务。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Apache Software Foundation Apache Tomcat 9.0.76 ~ 9.0.102 -

II. Public POCs for CVE-2025-31650

# POC Description Source Link Shenlong Link
1 A tool designed to detect the vulnerability **CVE-2025-31650** in Apache Tomcat (versions 10.1.10 to 10.1.39) https://github.com/absholi7ly/TomcatKiller-CVE-2025-31650 POC Details
2 CVE-2025-31650 PoC https://github.com/tunahantekeoglu/CVE-2025-31650 POC Details
3 None https://github.com/sattarbug/Analysis-of-TomcatKiller---CVE-2025-31650-Exploit-Tool POC Details
4 CVE-2025-31650 https://github.com/assad12341/DOS-exploit POC Details
5 CVE-2025-31650 https://github.com/assad12341/Dos-exploit- POC Details
6 None https://github.com/obscura-cert/CVE-2025-31650 POC Details
7 None https://github.com/B1gN0Se/Tomcat-CVE-2025-31650 POC Details
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III. Intelligence Information for CVE-2025-31650

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Mailing List Discussions for CVE-2025-31650 (1)

IV. Related Vulnerabilities

Same product: Apache Tomcat
Same vendor: Apache Software Foundation
Same weakness: CWE-459

V. Comments for CVE-2025-31650

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