Auth bypass in Nodemailer
CVE-2026-82660
Nodemailer before 8.0.9 fails to enforce disableFileAccess and disableUrlAccess options during message normalization in jsonTransport. Attackers can read local files or fetch URLs by supplying path or href values in message content fields, bypassing intended access controls.
Vulnerability class: Broken Access Control
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.003 (16.5th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 16th percentile — 16.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.003 · change: +0.001
Affected products
Weakness classification (CWE)
References
- github.com/nodemailer/nodemailer/security/advisories/GHSA-wqvq-jvpq-h66f (vendor-advisory)
- www.vulncheck.com/advisories/nodemailer-jsontransport-bypasses-disablefileacces… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-82660?
- CVE-2026-82660 is a medium-severity vulnerability in Nodemailer, classified under Missing Authorization. CVSS score: 5.4/10. Published 2026-08-31.
- How severe is CVE-2026-82660?
- Medium severity. CVSS v3 base score is 5.4 out of 10.