cvedb.io
CVE-2021-42340
HIGH · CVSS 7.5
EPSS exploitation probability: 0%
Published 2021-10-14T20:15:09.060 · Last modified 2026-06-17T04:09:40.450

Summary

The fix for bug 63362 present in Apache Tomcat 10.1.0-M1 to 10.1.0-M5, 10.0.0-M1 to 10.0.11, 9.0.40 to 9.0.53 and 8.5.60 to 8.5.71 introduced a memory leak. The object introduced to collect metrics for HTTP upgrade connections was not released for WebSocket connections once the connection was closed. This created a memory leak that, over time, could lead to a denial of service via an OutOfMemoryError.

Affected products

apache — tomcat

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References

This product uses data from the NVD API but is not endorsed or certified by the NVD. Informational only; not professional security advice.