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HIGH · 7.5

CVE-2026-34752

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.

Vulnerability Description

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.

CVSS Score

7.5

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH

Affected Products

VendorProductVersions
Haraka ProjectHaraka< 3.1.4

Related Weaknesses (CWE)

CWE-248

References

FAQ

What is CVE-2026-34752?

CVE-2026-34752 is a vulnerability with a CVSS score of 7.5 (HIGH). 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.

How severe is CVE-2026-34752?

CVE-2026-34752 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-34752?

Check the references section above for vendor advisories and patch information. Affected products include: Haraka Project Haraka.