CVE-2026-90776

Nodemailer 9.1.0 through 10.0.4 Denial of Service via Quadratic Address Parsing

Published: Sep 13, 2026Updated: Sep 16, 2026 Sources: CVE List NVDCWE-407

7.5HIGH

Description

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.

No summary for this CVE yet.

CVSS Vector Breakdown

Exploitability

AV:NAttack Vector

Network

AC:LAttack Complexity

Low

PR:NPrivileges Required

None

UI:NUser Interaction

None

Scope

S:UScope

Unchanged

Impact

C:NConfidentiality

None

I:NIntegrity

None

A:HAvailability

High

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Weaknesses

CWE-407

Affected Products

nodemailer

oss-project

nodemailerLibrary

OSS Libraries / generic-library

Exploitability

No known exploits, KEV entries, or remediation guidance available for this vulnerability yet.

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Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

1 technique

Impact

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References

https://github.com/nodemailer/nodemailer/security/advisories/GHSA-prgh-xp8r-p3m5

github.com

https://github.com/nodemailer/nodemailer/commit/c07f17518d25aca8ab2ad66968dcbca538c24b89

github.com

https://github.com/nodemailer/nodemailer/blob/v10.0.4/src/addressparser/index.ts#L251

github.com

and 3 more references View all →

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