Missing Authorization in nodemailer - CVE-2026-82660
Published: May 27, 2026 / Updated: September 14, 2026
Vulnerability identifier: #VU132357
CSH Severity: Low
CVSS v4: 5.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-82660
CWE-ID: CWE-862
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to disclose sensitive information and induce outbound HTTP requests.
The vulnerability exists due to missing authorization in jsonTransport message normalization and shared.resolveContent() when processing user-controlled message content fields such as attachment paths or href values. A remote user can supply a specially crafted message object to disclose sensitive information and induce outbound HTTP requests.
The same root cause is also reachable when attachDataUrls is enabled and object-form html content is resolved before MIME streaming enforcement.
Affected software
nodemailer
How to mitigate CVE-2026-82660
Install security update from vendor's website.
nodemailer - update to 8.0.9