CVE-2026-34752 Details
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.
A denial-of-service vulnerability has been identified in Haraka, a Node.js mail server, in versions prior to 3.1.4. The issue arises when an email is sent with '__proto__:' as a header name, causing the Haraka worker process to crash. In single-process mode, this failure brings down the entire server. In cluster mode, while the master restarts the worker, all active sessions are lost.
Users can upgrade to Haraka version 3.1.4 or later, where this vulnerability has been patched.
Metrics
CVSS 4.0 Severity and Vector Strings:
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Apr 3, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/haraka/Haraka/releases/tag/v3.1.4 | [email protected] | Release Notes |
| https://github.com/haraka/Haraka/security/advisories/GHSA-xph3-r2jf-4vp3 | [email protected] | ExploitVendor Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-248 | Uncaught Exception | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| haraka project haraka | < 3.1.4 |
CPE
Remediation
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Change History
5 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jul 24, 2026 | CVE Translated | [email protected] |
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Apr 3, 2026 | Initial Analysis | [email protected] |
| Apr 2, 2026 | New CVE Received | [email protected] |