cvedb.io
CVE-2025-5399
HIGH · CVSS 7.5
EPSS exploitation probability: 0%
Published 2025-06-07T08:15:20.687 · Last modified 2026-06-17T09:47:50.807

Summary

Due to a mistake in libcurl's WebSocket code, a malicious server can send a particularly crafted packet which makes libcurl get trapped in an endless busy-loop. There is no other way for the application to escape or exit this loop other than killing the thread/process. This might be used to DoS libcurl-using application.

Affected products

haxx — curl

Does this affect you?

Add your gear to cvedb and we'll alert you only when haxx ships something exploited.

Check my exposure →

References

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