CVE-2026-111943: Distrust compromised intermediate certificates in crypto/x509

Overview

Severity

High (CVSS 7.4)

CVSS Vector

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

Exploit Status

Not Exploited

Patch Tuesday

2026-Oct

Released

2026-10-23

EPSS Score

0.14% (percentile: 3.4%)

Detection & Weaponization (1 sources)

Maturity: Exploit

• GitHub PoC: 4 repositories

Affected Products (5)

Other

• 18315-17084
• 21857-17084
• 21809-17084
• 19693-17084
• 21021-17084

Revision History

• 2026-10-23: Information published.