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High 8.7Published Apr 2, 2026
CVE-2026-34752Haraka affected by DoS via `__proto__` email header
Updated under an hour ago ()
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It affects Haraka and 1 other product. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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
- 8.7 HIGH (v4.0, CNA)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
- Weakness (CWE)
- CWE-248
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- GitHub_M
- NVD analysis
- Analyzed
- Record last updated
- Apr 3, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
haraka Haraka haraka:haraka (from the name) | before 3.1.4 | CNA record |
haraka_project haraka haraka_project:haraka | before 3.1.4 | NVD |
References
- https://github.com/haraka/Haraka/security/advisories/GHSA-xph3-r2jf-4vp3x-refsource-confirm, exploit, vendor-advisory
- https://github.com/haraka/Haraka/releases/tag/v3.1.4x-refsource-misc, release-notes
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.