The (1) mbed_connect_step1 function in lib/vtls/mbedtls.c and (2) polarssl_connect_step1 function in lib/vtls/polarssl.c in cURL and libcurl before 7.49.0, when using SSLv3 or making a TLS connection to a URL that uses a numerical IP address, allow remote attackers to spoof servers via an arbitrary valid certificate.

Related CVEs

CVE-2016-3739

Key Information

GHSA ID

GHSA-4rcg-2r46-4hcc

Published

May 14, 2022 2:21 AM

Last Modified

May 1, 2024 6:30 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.