Infinite loop in cURL - CVE-2025-5399
Published: June 4, 2025
Vulnerability identifier: #VU110191
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2025-5399
CWE-ID: CWE-835
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: curl.haxx.se
Affected software:
cURL
cURL
Detailed vulnerability description
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to infinite loop within the WebSocket code. A malicious web server can send a specially crafted packet to the libcurl application and perform a denial of service (DoS) attack.
How to mitigate CVE-2025-5399
Install updates from vendor's website.