GHSA-vm5r-23w9-m8hx: Duplicate Advisory Denial of Service Vulnerability

HIGH
Share
CVSS 7.5
CWE-407
Published
Advisory Summary

GHSA-vm5r-23w9-m8hx is a HIGH (CVSS 7.5) denial of service vulnerability (CWE-407: Inefficient Algorithmic Complexity) affecting Duplicate Advisory libraries in the npm ecosystem. The issue involves nodemailer addressparser: o(n^2) on comment-joined addresses enables a remote dos (reachable via mailparser). Remediation is available in the latest vendor maintenance releases.

GHSA-vm5r-23w9-m8hx at a Glance

CVE Identifier N/A
GHSA Identifier GHSA-vm5r-23w9-m8hx
Severity HIGH
CVSS v3.1 Base Score 7.5
CWE Classification CWE-407: Inefficient Algorithmic Complexity
Affected Product Duplicate Advisory
Package Ecosystem npm
Published Date
Last Updated

Security Impact

CVSS: 7.5

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

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

How to Fix GHSA-vm5r-23w9-m8hx

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-vm5r-23w9-m8hx, 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-407: Inefficient Algorithmic Complexity, where an algorithm in a product has an inefficient worst-case computational complexity that may be detrimental to system performance and can be triggered by an attacker, typically using crafted manipulations that ensure that the worst case is being reached. 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-prgh-xp8r-p3m5. This link is maintained to preserve external references. ## Original Description Nodemailer versions 9.1.0 through 10.0.4 contain a quadratic time complexity vulnerability in the addressparser component when parsing email addresses with RFC 5322 comments. Attackers can craft malicious email headers with comment-separated atoms to consume excessive CPU and block the Node.js event loop for several seconds, causing denial of service.

GHSA-vm5r-23w9-m8hx Affected Duplicate Advisory Versions

1 component(s)
Product / Package Ecosystem Affected Versions Fixed Version
nodemailer
npm/nodemailer
npm
≥ 9.1.0
≤ 10.0.4

References

GitHub Advisory / Wiki ADVISORY
https://github.com/nodemailer/nodemailer/security/advisories/GHSA-prgh-xp8r-p3m5
NVD — GHSA-vm5r-23w9-m8hx NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-90776
Security Fix Commit FIX COMMIT
https://github.com/nodemailer/nodemailer/commit/c07f17518d25aca8ab2ad66968dcbca538c24b89
Duplicate Advisory Source Repository REPOSITORY
https://github.com/nodemailer/nodemailer
Duplicate Advisory Source Repository REPOSITORY
https://github.com/nodemailer/nodemailer/blob/v10.0.4/src/addressparser/index.ts#L251
Duplicate Advisory Release RELEASE
https://github.com/nodemailer/nodemailer/releases/tag/v10.0.5
www.vulncheck.com/advisories/nodemail... WEB
https://www.vulncheck.com/advisories/nodemailer-9.1.0-through-10.0.4-denial-of-service-via-quadratic-address-parsing

Frequently Asked Questions

What is GHSA-vm5r-23w9-m8hx?
GHSA-vm5r-23w9-m8hx is a security vulnerability in Duplicate Advisory involving Nodemailer addressparser: O(n^2) on comment-joined addresses enables a remote DoS (reachable via mailparser) under CWE-407: Inefficient Algorithmic Complexity.
Which Duplicate Advisory versions are affected?
Affected versions include releases prior to current release patches across affected packages: nodemailer.
What version fixes GHSA-vm5r-23w9-m8hx?
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-vm5r-23w9-m8hx?
GHSA-vm5r-23w9-m8hx has a CVSS v3.1 base score of 7.5 (HIGH) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
What CWE is associated with GHSA-vm5r-23w9-m8hx?
GHSA-vm5r-23w9-m8hx is classified under CWE-407: Inefficient Algorithmic Complexity (An algorithm in a product has an inefficient worst-case computational complexity that may be detrimental to system performance and can be triggered by an attacker, typically using crafted manipulations that ensure that the worst case is being reached.).
How can I check npm dependencies for GHSA-vm5r-23w9-m8hx?
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-vm5r-23w9-m8hx",
  "modified" : "2026-10-05T23:30:00Z",
  "published" : "2026-09-13T12:31:12Z",
  "withdrawn" : "2026-10-05T23:30:00Z",
  "aliases" : [ ],
  "summary" : "Duplicate Advisory: Nodemailer addressparser: O(n^2) on comment-joined addresses enables a remote DoS (reachable via mailparser)",
  "details" : "## Duplicate Advisory\n\nThis advisory has been withdrawn because it is a duplicate of GHSA-prgh-xp8r-p3m5. This link is maintained to preserve external references.\n\n## Original Description\nNodemailer versions 9.1.0 through 10.0.4 contain a quadratic time complexity vulnerability in the addressparser component when parsing email addresses with RFC 5322 comments. Attackers can craft malicious email headers with comment-separated atoms to consume excessive CPU and block the Node.js event loop for several seconds, causing denial of service.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
  }, {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/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" : "9.1.0"
      }, {
        "last_affected" : "10.0.4"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/nodemailer/nodemailer/security/advisories/GHSA-prgh-xp8r-p3m5"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-90776"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/nodemailer/nodemailer/commit/c07f17518d25aca8ab2ad66968dcbca538c24b89"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/nodemailer/nodemailer"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/nodemailer/nodemailer/blob/v10.0.4/src/addressparser/index.ts#L251"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/nodemailer/nodemailer/releases/tag/v10.0.5"
  }, {
    "type" : "WEB",
    "url" : "https://www.vulncheck.com/advisories/nodemailer-9.1.0-through-10.0.4-denial-of-service-via-quadratic-address-parsing"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-407" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-10-05T23:30:00Z",
    "nvd_published_at" : "2026-09-13T12:17:16Z"
  }
}