CVE-2026-92596 Nodemailer - Denial of Service

Nodemailer < 9.1.0 contains a denial of service caused by quadratic time complexity in the addressparser component, letting remote attackers freeze the Node.js event loop by sending crafted large address lists, exploit requires sending crafted email.

CVSS base score 7.5 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.82% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Denial of Service
Impact
Denial Of Service
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published
16 September 2026
Updated
15 October 2026
Weakness
CWE-400

Vendor fix

Upgrade to version 9.1.0 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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