CVE-2026-42501: Malicious module proxy can bypass checksum database in cmd/go

Overview

Severity

High (CVSS 7.5)

CVSS Vector

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

Exploit Status

Not Exploited

Patch Tuesday

2026-May

Released

2026-05-10

Last Updated

2026-09-17

EPSS Score

0.23% (percentile: 14.2%)

Affected Products (3)

Other

• 21203-17084
• 21206-17084
• 21778-17084

Security Updates (1)

• Security Update

Revision History

• 2026-05-10: Information published.
• 2026-05-11: Information published.
• 2026-05-13: Information published.
• 2026-05-19: Information published.
• 2026-06-03: Information published.
• 2026-06-09: Information published.
• 2026-09-03: Information published.
• 2026-09-09: Information published.
• 2026-09-17: Information published.