CVE-2025-48988 Apache Tomcat - DoS in multipart upload
Severity: Important
Vendor: The Apache Software Foundation
Versions Affected:
Apache Tomcat 11.0.0-M1 to 11.0.7
Apache Tomcat 10.1.0-M1 to 10.1.41
Apache Tomcat 9.0.0.M1 to 9.0.105
Description:
Tomcat used the same limit for both request parameters and parts in a
multipart request. Since uploaded parts also include headers which must
be retained, processing multipart requests can result in significantly
more memory usage. A specially crafted request that used a large number
of parts could trigger excessive memory usage leading to a DoS. The
maximum number of parts is now configurable (maxPartCount on the
Connector) with a default of 10 parts.
Mitigation:
Users of the affected versions should apply one of the following
mitigations:
- Upgrade to Apache Tomcat 11.0.8 or later
- Upgrade to Apache Tomcat 10.1.42 or later
- Upgrade to Apache Tomcat 9.0.106 or later
Credit:
The vulnerability was identified by the TERASOLUNA Framework Security
Team of NTT DATA Group Corporation
History:
2025-06-16 Original advisory
References:
[1] https://tomcat.apache.org/security-11.html
[2] https://tomcat.apache.org/security-10.html
[3] https://tomcat.apache.org/security-9.html
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