CVE-2026-3805: Haxx Curl

High severity, CVSS 7.5. EPSS: 1% chance of exploitation in the next 30 days.

When doing a second SMB request to the same host again, curl would wrongly use a data pointer pointing into already freed memory.

Affected products

• Haxx Curl: from 8.13.0, before 8.19.0 (fixed in 8.19.0)

Published 2026-03-11. Last modified 2026-09-14.