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 v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/haraka/Haraka/releases/tag/v3.1.4	Release Notes
https://github.com/haraka/Haraka/security/advisories/GHSA-xph3-r2jf-4vp3	Exploit Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:haraka_project:haraka:*:*:*:*:*:node.js:*:*

History

03 Apr 2026, 19:50

Type	Values Removed	Values Added
References	~~() https://github.com/haraka/Haraka/releases/tag/v3.1.4 -~~	() https://github.com/haraka/Haraka/releases/tag/v3.1.4 - Release Notes
References	~~() https://github.com/haraka/Haraka/security/advisories/GHSA-xph3-r2jf-4vp3 -~~	() https://github.com/haraka/Haraka/security/advisories/GHSA-xph3-r2jf-4vp3 - Exploit, Vendor Advisory
First Time		Haraka Project Haraka Project haraka
CPE		cpe:2.3:a:haraka_project:haraka::::::node.js::*
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 7.5

02 Apr 2026, 19:21

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-04-02 19:21

Updated : 2026-04-03 19:50

NVD link : CVE-2026-34752

Mitre link : CVE-2026-34752

CVE.ORG link : CVE-2026-34752

JSON object : View

Products Affected

haraka_project

haraka

CWE

CWE-248

Uncaught Exception

{"id": "CVE-2026-34752", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.5, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 3.9}], "cvssMetricV40": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"Safety": "NOT_DEFINED", "version": "4.0", "Recovery": "NOT_DEFINED", "baseScore": 8.7, "Automatable": "NOT_DEFINED", "attackVector": "NETWORK", "baseSeverity": "HIGH", "valueDensity": "NOT_DEFINED", "vectorString": "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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "exploitMaturity": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "userInteraction": "NONE", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "subIntegrityImpact": "NONE", "vulnIntegrityImpact": "NONE", "integrityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "vulnAvailabilityImpact": "HIGH", "availabilityRequirement": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "subConfidentialityImpact": "NONE", "vulnConfidentialityImpact": "NONE", "confidentialityRequirement": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED"}}]}, "published": "2026-04-02T19:21:33.517", "references": [{"url": "https://github.com/haraka/Haraka/releases/tag/v3.1.4", "tags": ["Release Notes"], "source": "security-advisories@github.com"}, {"url": "https://github.com/haraka/Haraka/security/advisories/GHSA-xph3-r2jf-4vp3", "tags": ["Exploit", "Vendor Advisory"], "source": "security-advisories@github.com"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-248"}]}], "descriptions": [{"lang": "en", "value": "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."}], "lastModified": "2026-04-03T19:50:42.600", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:haraka_project:haraka:*:*:*:*:*:node.js:*:*", "vulnerable": true, "matchCriteriaId": "C9BE9F60-CFA3-4F1C-808B-626BA5DCE6D2", "versionEndExcluding": "3.1.4"}], "operator": "OR"}]}], "sourceIdentifier": "security-advisories@github.com"}