CVE-2026-34752
High
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.
SeverityHigh
CVSS7.5
Exploit probability—
ProductHaraka
PublishedApr 2, 2026
First seenApr 2, 2026
Weakness typeCWE-248CWE-248
How to fix
Update
- haraka_project haraka3.1.4 or later
- Haraka3.1.4 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| haraka_project haraka | v < 3.1.4 | 3.1.4 |
| Harakanpm | v < 3.1.4 | 3.1.4 |
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