CVE-2025-52520
Apache Tomcat Catalina is vulnerable to DoS attack through bypassing of size limits
Description
For some unlikely configurations of multipart upload, an Integer Overflow vulnerability in Apache Tomcat could lead to a DoS via bypassing of size limits. 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, older, 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.
How to fix CVE-2025-52520
To remediate CVE-2025-52520, upgrade the affected package to a fixed version below.
- —upgrade to 9.0.107 or later
- —upgrade to 10.1.52-1~deb12u1 or later
- —upgrade to 11.0.15-1~deb13u1 or later
- —upgrade to 9.0.107-0+deb11u1 or later
- —upgrade to 11.0.9 or later
- —upgrade to 11.0.9 or later
Is CVE-2025-52520 being exploited?
Low — EPSS is 0.7%, meaning exploitation activity has not been observed at scale.
Affected packages (6)
- from 0, < 9.0.107, >= 10.0.0, < 10.1.43, >= 11.0.0, < 11.0.9
- from 0, < 10.1.52-1~deb12u1
- from 0, < 11.0.15-1~deb13u1
- from 0, < 9.0.107-0+deb11u1
- >= 11.0.0-M1, < 11.0.9
- >= 11.0.0-M1, < 11.0.9
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |