CVEvulnerability
CVE-2025-5399
7.5 HIGH
Official page ↗
- Status
- Analyzed
- Published
- 2025-06-07
- Last modified
- 2026-06-17
- Assigner
- 2499f714-1537-4658-8207-48ae4bb9eae9
- CVSS 3.1 (134c704f-9b21-4f2e-91b3-4a467353bcc0)
- 7.5 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Weaknesses
- CWE-835
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 configurations
• haxx curl (>= 8.13.0 < 8.14.1)
Related
Weakness · CWE (1)
- CWE-835 Loop with Unreachable Exit Condition weakness
References
- https://curl.se/docs/CVE-2025-5399.html Vendor Advisory
- https://curl.se/docs/CVE-2025-5399.json Vendor Advisory
- https://hackerone.com/reports/3168039 Exploit, Issue Tracking, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2025/06/04/2 Mailing List, Third Party Advisory