Vulnerability Details CVE-2025-5399
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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.001
EPSS Ranking 15.2%
CVSS Severity
CVSS v3 Score 7.5
References