curl and libcurl 7.27.0 through 7.35.0, when running on Windows and using the SChannel/Winssl TLS backend, does not verify that the server hostname matches a domain name in the subject's Common Name (CN) or subjectAltName field of the X.509 certificate when accessing a URL that uses a numerical IP address, which allows man-in-the-middle attackers to spoof servers via an arbitrary valid certificate.

Related CVEs

CVE-2014-2522

Key Information

GHSA ID

GHSA-wrgp-wm42-6wqv

Published

May 17, 2022 2:47 AM

Last Modified

April 12, 2025 12:32 PM

CVSS Score

5.0 /10

Primary Ecosystem

Unknown

Primary Package

Unknown

GitHub Reviewed

✗ No

Dataset

Last updated: September 29, 2025 6:31 AM

Data from GitHub Advisory Database. This information is provided for research and educational purposes.