CVE-2026-90776

Nodemailer versions 9.1.0 through 10.0.4 contain a quadratic time complexity vulnerability in the addressparser component when parsing email addresses with RFC 5322 comments. Attackers can craft malicious email headers with comment-separated atoms to consume excessive CPU and block the Node.js event loop for several seconds, causing denial of service.

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/nodemailer/nodemailer
https://github.com/nodemailer/nodemailer/blob/v10.0.4/src/addressparser/index.ts#L251
https://github.com/nodemailer/nodemailer/commit/c07f17518d25aca8ab2ad66968dcbca538c24b89
https://github.com/nodemailer/nodemailer/releases/tag/v10.0.5
https://github.com/nodemailer/nodemailer/security/advisories/GHSA-prgh-xp8r-p3m5
https://www.vulncheck.com/advisories/nodemailer-9.1.0-through-10.0.4-denial-of-service-via-quadratic-address-parsing
https://github.com/nodemailer/nodemailer/security/advisories/GHSA-prgh-xp8r-p3m5

Configurations

No configuration.

History

16 Sep 2026, 15:18

Type	Values Removed	Values Added
References	~~() https://github.com/nodemailer/nodemailer/security/advisories/GHSA-prgh-xp8r-p3m5 -~~	() https://github.com/nodemailer/nodemailer/security/advisories/GHSA-prgh-xp8r-p3m5 -

Information

Published : 2026-09-13 12:17

Updated : 2026-09-16 15:18

NVD link : CVE-2026-90776

Mitre link : CVE-2026-90776

CVE.ORG link : CVE-2026-90776

JSON object : View

Products Affected

No product.

CWE

CWE-407

Inefficient Algorithmic Complexity

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