CVE-2026-87862: HSTS cache import drops longer-lived child

Overview

Severity

Medium (CVSS 4.8)

CVSS Vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N

Exploit Status

Not Exploited

Patch Tuesday

2026-Oct

Released

2026-10-23

Last Updated

2026-10-23

EPSS Score

0.29% (percentile: 20.5%)

Affected Products (2)

Other

• 21707-17084
• 21840-17084

Revision History

• 2026-10-23: Information published.
• 2026-10-23: Information published.