CVE-2023-32762: Debian Linux

Medium severity, CVSS 5.3. EPSS: 0.9% chance of exploitation in the next 30 days.

An issue was discovered in Qt before 5.15.14, 6.x before 6.2.9, and 6.3.x through 6.5.x before 6.5.1. Qt Network incorrectly parses the strict-transport-security (HSTS) header, allowing unencrypted connections to be established, even when explicitly prohibited by the server. This happens if the case used for this header does not exactly match.

Affected products

• Debian Debian Linux: version 10.0 only
• Qt Qt: from 5.9.0, before 5.15.14 (fixed in 5.15.14); from 6.0.0, before 6.2.9 (fixed in 6.2.9); from 6.3.0, before 6.5.1 (fixed in 6.5.1)

Published 2023-05-28. Last modified 2026-06-17.