Answer in brief
CVE-2026-90776 records a High severity (CVSS 8.7) 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), nodemailer (npm), nodemailer (npm). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 8.7. 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), nodemailer (npm), nodemailer (npm). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| nodemailer/nodemailergeneric | >=9.1.0 <10.0.5 | 10.0.5 |
| nodemailernpm | >=9.1.0,<=10.0.4 | 10.0.5 |
| nodemailernpm | >=9.1.0 <10.0.5 | 10.0.5 |
Published upstream
Sep 13, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Sep 30, 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.