title: TLS certificate check bypass with mbedTLS
description: libcurl did not check the server certificate of TLS connections done to a host specified as an IP address, when built to use mbedTLS.  libcurl would wrongly avoid using the set hostname function when the specified hostname was given as an IP address, therefore completely skipping the certificate check. This affects all uses of TLS protocols (HTTPS, FTPS, IMAPS, POPS3, SMTPS, etc).
problem types: CWE-297 Improper Validation of Certificate with Host Mismatch
affected:
{
vendor: curl
product: curl
versions:
version: 8.6.0, status: affected, lessThanOrEqual: 8.6.0, versionType: semver
version: 8.5.0, status: affected, lessThanOrEqual: 8.5.0, versionType: semver
defaultStatus: unaffected
}