CVE-2026-34752CWE-248

CVE-2026-34752

High · published April 2, 2026

CVSS v3.1
7.5
EPSS
1%
Percentile
43.0
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
7.5 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS v4.0
Not supplied
EPSS
0.00515 · 43.0th percentile
Weakness
CWE-248 · Uncaught Exception
Published
2026-04-02T23:21Z
Affected products (1)
ProductVersionsFixed in
haraka_project/haraka< 3.1.43.1.4
References (2)
https://github.com/haraka/Haraka/releases/tag/v3.1.4 · [email protected]https://github.com/haraka/Haraka/security/advisories/GHSA-xph3-r2jf-4vp3 · [email protected]
EPSS history
Timeline
  • 02 APR 18:42Z
    Haraka affected by DoS via `__proto__` email header
    cvelistv5