CVE-2025-61795: Apache Tomcat: Delayed cleaning of multi-part upload temporary files may lead to DoS

Severity: medium (CVSS 5.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2025-10-27 · updated 2026-10-08
Weakness: CWE-404

Description

Improper Resource Shutdown or Release vulnerability in Apache Tomcat. If an error occurred (including exceeding limits) during the processing of a multipart upload, temporary copies of the uploaded parts written to disc were not cleaned up immediately but left for the garbage collection process to delete. Depending on JVM settings, application memory usage and application load, it was possible that space for the temporary copies of uploaded parts would be filled faster than GC cleared it, leading to a DoS. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.11, from 10.1.0-M1 through 10.1.46, from 9.0.0.M1 through 9.0.109. The following versions were EOL at the time the CVE was created but are known to be affected: 8.5.0 though 8.5.100. Other, older, EOL versions may also be affected. Users are recommended to upgrade to version 11.0.12 or later, 10.1.47 or later or 9.0.110 or later which fixes the issue.

Affected products

Apache Tomcat: from 8.5.0 through 8.5.100; from 9.0.0 before 9.0.110; from 10.0.0 before 10.0.27; from 10.1.0 before 10.1.47; from 11.0.0 before 11.0.12 — fixed in 10.0.27, 10.1.47, 11.0.12, 9.0.110

How to fix

Upgrade to a fixed version: Apache Tomcat 10.0.27, 10.1.47, 11.0.12, 9.0.110. Check the vendor advisory for mitigations.

References

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