{"id":"GHSA-frj6-5rhh-vwfw","title":"Duplicate Advisory: Nodemailer: Improper TLS Certificate Validation in OAuth2 Token Fetch Enables Credential Interception","summary":"Duplicate Advisory: Nodemailer: Improper TLS Certificate Validation in OAuth2 Token Fetch Enables Credential Interception","severity":"high","cvss":6.5,"cwe":["CWE-295"],"vendor":"nodemailer","product":"nodemailer","ecosystem":"npm","affected":["nodemailer <= 8.0.7"],"published":"2026-08-31","updated":"2026-10-05","sourceUpdated":"2026-10-05T22:51:42Z","source":"GHSA","sourceUrl":"https://github.com/advisories/GHSA-frj6-5rhh-vwfw","references":[{"url":"https://github.com/nodemailer/nodemailer/security/advisories/GHSA-r7g4-qg5f-qqm2"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-82662"},{"url":"https://www.vulncheck.com/advisories/nodemailer-before-8.0.8-tls-certificate-validation-bypass"},{"url":"https://github.com/advisories/GHSA-frj6-5rhh-vwfw"}],"tags":["ghsa","npm"],"ingestedAt":"2026-10-05T23:36:21.175Z","slug":"GHSA-frj6-5rhh-vwfw","body":"## Overview\n\n## Duplicate Advisory\n\nThis advisory has been withdrawn because it is a duplicate of GHSA-r7g4-qg5f-qqm2. This link is maintained to preserve external references.\n\n## Original Description\nNodemailer 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.\n\n## Affected packages\n\n- `nodemailer <= 8.0.7`\n\n## Remediation\n\nRefer to the advisory for the patched release.","depth":"twilight","depthScore":36,"depthScoreParts":{"impact":35.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}