CVE Catalog

CVE-2026-34752

HighCVSS 7.5
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Low risk
0.43%

35th percentile - higher than 35% of all known CVEs

Summary

A vulnerability in Haraka mail server (Node.js) prior to version 3.1.4 allows sending an email with __proto__ as a header name to crash the Haraka worker process.

Risk Assessment

An attacker can remotely crash the mail server worker process, leading to mail delivery disruption.

Recommendation

Update Haraka to version 3.1.4 or later.

Related vulnerabilities

Original NVD description (English source)

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 data from NVD (NIST) · CISA KEV · EPSS