CVE-2026-80231: Haxx Curl

High severity, CVSS 7.5. EPSS: 0.9% chance of exploitation in the next 30 days.

A flaw in libcurl makes it wrongly reuse an existing HTTPS connection setup for a given hostname even when using a different Native CA Store setting (`CURLSSLOPT_NATIVE_CA`) than when the connection was created.

Affected products

• Haxx Curl: from 7.71.0, before 8.22.0 (fixed in 8.22.0)

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