CVE-2026-121946

HighCVSS 7.2/10Last modified Nov 12, 2026

Description

zbateson mail-mime-parser before 3.0.9 and 4.x before 4.0.6 contains a CRLF header injection vulnerability in message-building helpers that fail to strip CR and LF characters. Attackers supplying crafted MIME type, charset, encoding, micalg, or protocol values can inject extra header lines such as a forged Bcc into outgoing messages.

Metrics

CVSS 3.1 7.2/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N

Weakness enumeration

CWE-93

Affected software

No affected versions have been published.

Timeline

Published
Nov 4, 2026
Last modified
Nov 12, 2026
NVD status
Deferred

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CVE-2026-121946: High severity, CVSS 7.2 | Vulnix