CVE-2026-100700
8.7
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Summary
nodemailer before 10.0.6 contains a denial of service vulnerability in the addressparser free-text fallback regex pattern that exhibits quadratic backtracking behavior. Attackers can supply crafted email header values with long whitespace-free runs to block the Node.js event loop for tens of seconds, causing service unavailability.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| nodemailer | nodemailer | 0 < 10.0.6 | affected |
| nodemailer | nodemailer | 10.0.6 | unaffected |
Weaknesses
- CWE-407: Inefficient Algorithmic Complexity
References
- https://github.com/nodemailer/nodemailer/security/advisories/GHSA-v53p-9fqp-m79j
- https://www.vulncheck.com/advisories/nodemailer-before-10.0.6-denial-of-service-via-addressparser
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