CVE-2026-82662
Nodemailer before 8.0.8 TLS Certificate Validation Bypass
- State
- Published
- Severity
- 8.3 High
- Published
- Aug 31, 2026
- Updated
- Sep 1, 2026
- Reserved
- Aug 30, 2026
Description
Nodemailer before 8.0.8 disables TLS certificate verification in lib/fetch/index.js through rejectUnauthorized: false, allowing attackers to intercept OAuth2 token requests. Attackers in a machine-in-the-middle position can capture OAuth client secrets, refresh tokens, and access tokens transmitted over compromised HTTPS connections.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 8.3 High | CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N | VulnCheck |
| 3.1 | 6.5 Medium | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N | VulnCheck |
Weaknesses
- CWE-295 Improper Certificate Validation
Affected Products
| Product | Versions |
|---|---|
nodemailernodemailer |
|
References
- GitHub Security Advisory (GHSA-r7g4-qg5f-qqm2)vendor-advisory
- VulnCheck Advisory: Nodemailer before 8.0.8 TLS Certificate Validation Bypassthird-party-advisory
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