CVE-2026-39820: Quadratic string concatentation in consumeComment in net/mail

Overview

Severity

High (CVSS 7.5)

CVSS Vector

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

Exploit Status

Not Exploited

Patch Tuesday

2026-May

Released

2026-05-10

EPSS Score

0.04% (percentile: 12.6%)

Affected Products (2)

Other

• 21203-17084
• 21206-17084

Revision History

• 2026-05-10: Information published.