← Vulnerability feed

Vulnerability record · CVE-2026-34752 · published 2 April 2026

CVE-2026-34752: Haraka project haraka vulnerability

Haraka Project · Haraka

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.

8.7 CVSS 4.0 High EPSS 0.52% · top 58.5% CWE-248 · CWE-248
8.7CVSS 4.0 base score
0.52%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
2References, 1 tagged exploit
24 Jul 2026Last modified by NVD

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:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/haraka/Haraka/releases/tag/v3.1.4 Release Notes
https://github.com/haraka/Haraka/security/advisories/GHSA-xph3-r2jf-4vp3 ExploitVendor Advisory

Track CVE-2026-34752 inside VULONE

Watch it alongside the ransomware crews, C2 infrastructure and forum chatter that reference it, query it through the API and pull it into your SIEM over TAXII.

Start free Open in platform

Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2016-1000282Haraka project haraka command injection vulnerabilityHaraka version 2.8.8 and earlier comes with a plugin for processing attachments for zip files. Versions 2.8.8 and earlier can be vulnerable to comman…EPSS 13%

Source: NIST National Vulnerability Database (record CVE-2026-34752), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.