Improper authentication in cURL - CVE-2025-15224
Published: January 7, 2026
Vulnerability identifier: #VU121030
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2025-15224
CWE-ID: CWE-287
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 bypass authentication process.
The vulnerability exists due to an error when doing SSH-based transfers using either SCP or SFTP, and asked to do public key authentication. In such case the curl would wrongly still ask and authenticate using a locally running SSH agent.
Note, the vulnerability affects libcurl builds that use libssh backend instead of libssh2.
How to mitigate CVE-2025-15224
Install updates from vendor's website.