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.

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

EPSS: 0.002 (8.6th percentile) — read the EPSS interpretation.

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.

Affected products

Nodemailer

Weakness classification (CWE)

CWE-862 — Missing Authorization

References

disclosure@vulncheck.com (vendor-advisory)
disclosure@vulncheck.com (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.