CVE-2025-5399

HIGH7.5EPSS 0.57%
Published: 6/7/2025Modified: 4/28/2026
Also known as:ALPINE-CVE-2025-5399DEBIAN-CVE-2025-5399

Description

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 packages (2)

CVSS scores

SourceVersionSeverityVector
osvCVSS 3.1HIGH7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References (2)