CVE-2026-55620: eml_parser: DoS via deeply nested parens in Received headers

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-Aug

Released

2026-08-27

EPSS Score

0.37% (percentile: 29.5%)

Affected Products (1)

Other

• 21365-17084

Revision History

• 2026-08-27: Information published.