CVE-2026-80230: Haxx Curl

High severity, CVSS 7.5. EPSS: 0.4% chance of exploitation in the next 30 days.

When `CURLOPT_PINNEDPUBLICKEY` is configured alongside options that disable standard peer verification (`CURLOPT_SSL_VERIFYPEER = 0` and `CURLOPT_SSL_VERIFYHOST = 0`), libcurl fails to enforce public key pinning on connections established without a presented server certificate. Bypassing the pinning check under these disabled-verification conditions allows unauthenticated connections to succeed when they should be rejected.

Affected products

• Haxx Curl: from 7.45.0, before 8.22.0 (fixed in 8.22.0)

Published 2026-09-06. Last modified 2026-09-15.