CVE WatchNov 4, 2026

CVE-2026-121946

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

CVSS

7.2

High

EPSS

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KEV

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Exploit Today

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0-100

Published: Nov 4, 2026 · Last modified: Nov 4, 2026 · CWE-93

EPSS · 30d

Not enough EPSS history yet.

Technical 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.

Official references

Related CVEs

CVECVSSEPSSKEVRExploitTitleMod.

CVE-2026-571548.1 HIG

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