CVE-2025-5399
7.5
HIGH
CVSS 3.1
EPSS 0.57%
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.
How to fix CVE-2025-5399
To remediate CVE-2025-5399, upgrade the affected package to a fixed version below.
- —upgrade to 8.14.1-r0 or later
- —upgrade to 8.14.1-1 or later
Is CVE-2025-5399 being exploited?
Low — EPSS is 0.6%, meaning exploitation activity has not been observed at scale.
Affected packages (2)
- from 0, < 8.14.1-r0
- from 0, < 8.14.1-1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |