Nodemailer before 10.0.2 fails to properly flatten deeply nested arrays in recipient fields such as to, cc, and bcc, allowing attackers to cause stack exhaustion. Attackers can supply a deeply nested JSON recipient array that triggers recursive Array.toString() conversion, exhausting the call stack and terminating the Node.js process.

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Fixes

Solution

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Workaround

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History

Sun, 27 Sep 2026 00:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Sun, 27 Sep 2026 00:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-770
References
Metrics threat_severity

None

threat_severity

Moderate


Sat, 26 Sep 2026 13:30:00 +0000

Type Values Removed Values Added
Description Nodemailer before 10.0.2 fails to properly flatten deeply nested arrays in recipient fields such as to, cc, and bcc, allowing attackers to cause stack exhaustion. Attackers can supply a deeply nested JSON recipient array that triggers recursive Array.toString() conversion, exhausting the call stack and terminating the Node.js process.
Title Nodemailer before 10.0.2 Stack Exhaustion via Nested Recipient Arrays
First Time appeared Nodemailer
Nodemailer nodemailer
Weaknesses CWE-674
CPEs cpe:2.3:a:nodemailer:nodemailer:*:*:*:*:*:*:*:*
Vendors & Products Nodemailer
Nodemailer nodemailer
References
Metrics cvssV3_1

{'score': 5.9, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H'}

cvssV4_0

{'score': 8.2, 'vector': 'CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-09-26T23:11:16.551Z

Reserved: 2026-09-26T02:39:50.973Z

Link: CVE-2026-100702

cve-icon Vulnrichment

Updated: 2026-09-26T23:11:13.517Z

cve-icon NVD

Status : Received

Published: 2026-09-26T14:16:55.280

Modified: 2026-09-27T00:16:34.667

Link: CVE-2026-100702

cve-icon Redhat

Severity : Moderate

Publid Date: 2026-09-26T13:23:57Z

Links: CVE-2026-100702 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-09-27T02:30:16Z

Weaknesses