Answer in brief
CVE-2026-90776 records a Unknown severity vulnerability in Nodemailer 9.1.0 through 10.0.4 Denial of Service via Quadratic Address Parsing. The current sources do not mark it as known exploited. The current feed maps nodemailer/nodemailer (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps nodemailer/nodemailer (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| nodemailer/nodemailergeneric | >=9.1.0 <10.0.5 | 10.0.5 |
Published upstream
Sep 13, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Sep 13, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Sep 13, 2026
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.
Quoted source text, attributed separately from HOL analysis.