CVE-2025-53506
published 2025-07-10CVE-2025-53506: Uncontrolled Resource Consumption vulnerability in Apache Tomcat if an HTTP/2 client did not acknowledge the initial settings frame that reduces the maximum…
high7.5CVSS 3.1
AVNACLPRNUINSUCNINAH
Uncontrolled Resource Consumption vulnerability in Apache Tomcat if an HTTP/2 client did not acknowledge the initial settings frame that reduces the maximum permitted concurrent streams.
This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.8, from 10.1.0-M1 through 10.1.42, from 9.0.0.M1 through 9.0.106.
The following versions were EOL at the time the CVE was created but are
known to be affected: 8.5.0 through 8.5.100. Other EOL versions may also be affected.
Users are recommended to upgrade to version 11.0.9, 10.1.43 or 9.0.107, which fix the issue.
Affected
10 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| apache | tomcat | 10.1.0 – 10.1.42 | — |
| apache | tomcat | 11.0.0 – 11.0.8 | — |
| apache | tomcat | 9.0.0 – 9.0.106 | — |
| apache_software_foundation | apache_tomcat | 10.1.0-M1 – 10.1.42 | — |
| apache_software_foundation | apache_tomcat | 11.0.0-M1 – 11.0.8 | — |
| apache_software_foundation | apache_tomcat | 8.5.0 – 8.5.100 | — |
| apache_software_foundation | apache_tomcat | 9.0.0.M1 – 9.0.106 | — |
| debian | tomcat10 | < tomcat10 10.1.52-1~deb12u1 (bookworm) | tomcat10 10.1.52-1~deb12u1 (bookworm) |
| debian | tomcat11 | < tomcat10 10.1.52-1~deb12u1 (bookworm) | tomcat10 10.1.52-1~deb12u1 (bookworm) |
| debian | tomcat9 | < tomcat10 10.1.52-1~deb12u1 (bookworm) | tomcat10 10.1.52-1~deb12u1 (bookworm) |
CVSS provenance
nvdv3.17.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
osv7.5HIGH