# CVE-2026-34752

## Summary

- **CVE ID:** CVE-2026-34752
- **Severity:** HIGH
- **CVSS Score:** 8.7 (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)
- **CWE:** CWE-248
- **Published:** Apr 2, 2026
- **Last Modified:** Apr 3, 2026

## 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.

## Affected Products

- haraka — Haraka (< 3.1.4)

## References

- [CNA](https://github.com/haraka/Haraka/security/advisories/GHSA-xph3-r2jf-4vp3)
- [CNA](https://github.com/haraka/Haraka/releases/tag/v3.1.4)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.43%
- **EPSS Percentile:** 36.4

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-10._