CVE-2026-34752

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

8.7CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

CVSS 3.1

7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS

0.4% chance of exploitation in the next 30 days; higher than 37% of CVEs (scores of 2026-10-25)

CWE

CWE-248

Published

2026-04-02

Modified

2026-10-06

Record from

the NVD, synced 2026-10-19

Affected

• haraka_project:haraka

Packages (OSV)

References

• https://github.com/haraka/Haraka/releases/tag/v3.1.4
• https://github.com/haraka/Haraka/security/advisories/GHSA-xph3-r2jf-4vp3

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