CVE-2026-56864: Ignore unrelated, unauthenticated hashes in Lookup in golang.org/x/mod/sumdb

Overview

Severity

High (CVSS 7.5)

CVSS Vector

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

Exploit Status

Not Exploited

Patch Tuesday

2026-Aug

Released

2026-08-20

Last Updated

2026-09-25

EPSS Score

0.30% (percentile: 20.4%)

Affected Products (5)

Other

• 21660-17084
• 21676-17084
• 21021-17084
• 21857-17084
• 21778-17084

Security Updates (1)

• Security Update

Revision History

• 2026-08-20: Information published.
• 2026-09-03: Information published.
• 2026-09-07: Information published.
• 2026-09-09: Information published.
• 2026-09-17: Information published.
• 2026-09-25: Information published.