CVE-2021-21419

MediumCVSS 5.3/10Last modified Jun 17, 2026

Description

Eventlet is a concurrent networking library for Python. A websocket peer may exhaust memory on Eventlet side by sending very large websocket frames. Malicious peer may exhaust memory on Eventlet side by sending highly compressed data frame. A patch in version 0.31.0 restricts websocket frame to reasonable limits. As a workaround, restricting memory usage via OS limits would help against overall machine exhaustion, but there is no workaround to protect Eventlet process.

Metrics

CVSS 3.1 5.3/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Weakness enumeration

CWE-400

Affected software

VendorProductVersions
eventleteventlet>= 0.10, < 0.31.0

References

Timeline

Published
May 7, 2021
Last modified
Jun 17, 2026
NVD status
Modified

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