GHSA-frj6-5rhh-vwfw: Duplicate Advisory Remote Code Execution Vulnerability

HIGH
Share
CVSS 6.5
CWE-295
Published
Advisory Summary

GHSA-frj6-5rhh-vwfw is a HIGH (CVSS 6.5) remote code execution vulnerability (CWE-295: Improper Certificate Validation) affecting Duplicate Advisory libraries in the npm ecosystem. The issue involves nodemailer: improper tls certificate validation in oauth2 token fetch enables credential interception. Remediation is available in the latest vendor maintenance releases.

GHSA-frj6-5rhh-vwfw at a Glance

CVE Identifier N/A
GHSA Identifier GHSA-frj6-5rhh-vwfw
Severity HIGH
CVSS v3.1 Base Score 6.5
CWE Classification CWE-295: Improper Certificate Validation
Affected Product Duplicate Advisory
Package Ecosystem npm
Published Date
Last Updated

Security Impact

CVSS: 6.5

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N).

Attack Vector Network (AV:N)
Attack Complexity High (AC:H)
Privileges Required None (PR:N)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality High (C:H)
Integrity Low (I:L)
Availability None (A:N)

How to Fix GHSA-frj6-5rhh-vwfw

To remediate this vulnerability, upgrade all affected Duplicate Advisory dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

nodemailer fixed: Latest secure release 
npm install nodemailer@Latest secure release
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

npm ls nodemailer

How to Check if You Are Affected

To determine whether your Node.js application is affected by GHSA-frj6-5rhh-vwfw, inspect your project dependencies using npm:

npm ls nodemailer

Analyze the terminal output to locate any version of Duplicate Advisory in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than the patched release), your application is affected.

Note: The npm ls nodemailer command inspects dependencies declared in your package.json and lockfile; it does not perform automated runtime dynamic scanning.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-295: Improper Certificate Validation, where the product does not validate, or incorrectly validates, a certificate. In Duplicate Advisory, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

## Duplicate Advisory This advisory has been withdrawn because it is a duplicate of GHSA-r7g4-qg5f-qqm2. This link is maintained to preserve external references. ## Original 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.

GHSA-frj6-5rhh-vwfw Affected Duplicate Advisory Versions

1 component(s)
Product / Package Ecosystem Affected Versions Fixed Version
nodemailer
npm/nodemailer
npm
≤ 8.0.7

References

GitHub Advisory / Wiki ADVISORY
https://github.com/nodemailer/nodemailer/security/advisories/GHSA-r7g4-qg5f-qqm2
NVD — GHSA-frj6-5rhh-vwfw NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-82662
www.vulncheck.com/advisories/nodemail... WEB
https://www.vulncheck.com/advisories/nodemailer-before-8.0.8-tls-certificate-validation-bypass

Frequently Asked Questions

What is GHSA-frj6-5rhh-vwfw?
GHSA-frj6-5rhh-vwfw is a security vulnerability in Duplicate Advisory involving Nodemailer: Improper TLS Certificate Validation in OAuth2 Token Fetch Enables Credential Interception under CWE-295: Improper Certificate Validation.
Which Duplicate Advisory versions are affected?
Affected versions include releases prior to current release patches across affected packages: nodemailer.
What version fixes GHSA-frj6-5rhh-vwfw?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
Is nodemailer affected?
Yes, nodemailer is affected in releases prior to Latest secure release. Upgrade your dependency to Latest secure release or later.
What is the CVSS score of GHSA-frj6-5rhh-vwfw?
GHSA-frj6-5rhh-vwfw has a CVSS v3.1 base score of 6.5 (HIGH) with vector string CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N.
What CWE is associated with GHSA-frj6-5rhh-vwfw?
GHSA-frj6-5rhh-vwfw is classified under CWE-295: Improper Certificate Validation (The product does not validate, or incorrectly validates, a certificate.).
How can I check npm dependencies for GHSA-frj6-5rhh-vwfw?
Run the dependency tree command: 'npm ls nodemailer'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-frj6-5rhh-vwfw",
  "modified" : "2026-10-05T22:51:40Z",
  "published" : "2026-08-31T09:30:29Z",
  "withdrawn" : "2026-10-05T22:51:40Z",
  "aliases" : [ ],
  "summary" : "Duplicate Advisory: Nodemailer: Improper TLS Certificate Validation in OAuth2 Token Fetch Enables Credential Interception",
  "details" : "## 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.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N"
  }, {
    "type" : "CVSS_V4",
    "score" : "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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "npm",
      "name" : "nodemailer"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "last_affected" : "8.0.7"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/nodemailer/nodemailer/security/advisories/GHSA-r7g4-qg5f-qqm2"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-82662"
  }, {
    "type" : "WEB",
    "url" : "https://www.vulncheck.com/advisories/nodemailer-before-8.0.8-tls-certificate-validation-bypass"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-295" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-10-05T22:51:40Z",
    "nvd_published_at" : "2026-08-31T09:17:04Z"
  }
}