Apache Tomcat: DoS via malformed HTTP/2 PRIORITY_UPDATE frame
55Vexday Risk Score
No sign of exploitation. It has a public proof of concept.
ssvc Attendcvss 7.5epss 60%
from disclosure to weapon2 days
Published on NVDApr 28
1st PoC+2d
exploitation probability
60%top 1% of all CVEs
observed exploitation
nono source reports it
8 public exploit(s)
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.
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 Tomcatpublic PoCs found — 8
exploitdbwww.exploit-db.com/exploits/52318unverifiedgithubgithub.com/absholi7ly/TomcatKiller-CVE-2025-31650★ 20githubgithub.com/tunahantekeoglu/CVE-2025-31650★ 2githubgithub.com/sattarbug/Analysis-of-TomcatKiller---CVE-2025-31650-Exploit-Tool★ 0githubgithub.com/assad12341/DOS-exploit★ 0githubgithub.com/assad12341/Dos-exploit-★ 0githubgithub.com/obscura-cert/CVE-2025-31650★ 0githubgithub.com/B1gN0Se/Tomcat-CVE-2025-31650★ 0⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.