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HIGHCVE-2026-34752Published Modified CNA GitHub_M

CVE-2026-34752: Haraka affected by DoS via `__proto__` email header

Haraka is a Node.js mail server. Prior to version 3.1.4, sending an email with __proto__: as a header name crashes the Haraka worker process. This issue has been patched in version 3.1.4.

Metrics

CVSS v4.0
8.7
Severity
HIGH
Fixed in
—
Affected Products
1
Affected packages
  • haraka / Haraka
    < 3.1.4
CVSS Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
References
CVE-2026-34752: Haraka affected by DoS via `__proto__` email header | HarborGuard CVE