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.
- Affected products
- Alt Linux, Almalinux, Astra Linux, Mysql Server, Red Hat, Suse, Libcurl
- Haxx Curl
- < 8.14.1
- Fix
- Available
- CVSS 3.1
- 7.5 HIGH
- EPSS
- 1.3% (67th percentile)
- Weakness
- CWE-835
- NVD status
- Analyzed
- Published
- 2025-06-07
CVE-2025-5399 at NVD
No indexed exploits for CVE-2025-5399 yet
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No exploit for CVE-2025-5399 has been indexed yet. Our index is built from live traffic and upstream syncs, so this page can only say what it knows — not that no exploit exists.