AIKIDO-2026-760491
libcurl is vulnerable to Improper Certificate Validation
37
Low Risk
This Affects:
libcurlTL;DR
With CURLOPT_PINNEDPUBLICKEY set, libcurl skips the pin check when CURLOPT_SSL_VERIFYPEER and CURLOPT_SSL_VERIFYHOST are both off and the server presents no certificate. The connection succeeds even though the pin should have rejected it. The fix rejects a missing server certificate when a public key pin is set.
Who does this affect?
You are affected if you are using a version that falls within the vulnerable range and you set a public key pin and also disable peer and host verification.
Background info
libcurl is vulnerable to Improper Certificate Validation in versions 7.45.0 - 8.21.0.
How to fix this
Upgrade the libcurl and/or the curl.curl library to the patch version.
Links
GitHub Release
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