جزئیات آسیب‌پذیری

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.

• https://curl.se/docs/CVE-2025-5399.json
• https://curl.se/docs/CVE-2025-5399.html
• https://hackerone.com/reports/3168039
• http://www.openwall.com/lists/oss-security/2025/06/04/2