GHSA-6F65-4FV2-WWCH

Vulnerability from github – Published: 2026-01-30 19:35 – Updated: 2026-01-30 19:35
VLAI?
Summary
Vendure vulnerable to timing attack that enables user enumeration in NativeAuthenticationStrategy
Details

Summary

The NativeAuthenticationStrategy.authenticate() method is vulnerable to a timing attack that allows attackers to enumerate valid usernames (email addresses).

Details

In packages/core/src/config/auth/native-authentication-strategy.ts, the authenticate method returns immediately if a user is not found:

const user = await this.userService.getUserByEmailAddress(ctx, data.username);
if (!user) {
    return false; // Instant return (~1-5ms)
}
const passwordMatch = await this.verifyUserPassword(ctx, user.id, data.password);
// Password check takes ~200-400ms with bcrypt (12 rounds)

The significant timing difference (~200-400ms for bcrypt vs ~1-5ms for DB miss) allows attackers to reliably distinguish between existing and non-existing accounts.

Impact

  • Attackers can enumerate valid user accounts
  • Enables targeted brute-force or phishing attacks
  • Information disclosure (account existence)

Recommended Fix

Perform a dummy bcrypt check when user is not found to ensure consistent response times.

Severity ?
2.7 (Low)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U
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{
  "affected": [
    {
      "package": {
        "ecosystem": "npm",
        "name": "@vendure/core"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.5.3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-25050"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-202"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-01-30T19:35:40Z",
    "nvd_published_at": "2026-01-30T16:16:13Z",
    "severity": "LOW"
  },
  "details": "### Summary\nThe `NativeAuthenticationStrategy.authenticate()` method is vulnerable to a timing attack that allows attackers to enumerate valid usernames (email addresses).\n\n### Details\nIn `packages/core/src/config/auth/native-authentication-strategy.ts`, the authenticate method returns immediately if a user is not found:\n\n```typescript\nconst user = await this.userService.getUserByEmailAddress(ctx, data.username);\nif (!user) {\n    return false; // Instant return (~1-5ms)\n}\nconst passwordMatch = await this.verifyUserPassword(ctx, user.id, data.password);\n// Password check takes ~200-400ms with bcrypt (12 rounds)\n```\n\nThe significant timing difference (~200-400ms for bcrypt vs ~1-5ms for DB miss) allows attackers to reliably distinguish between existing and non-existing accounts.\n\n### Impact\n- Attackers can enumerate valid user accounts\n- Enables targeted brute-force or phishing attacks\n- Information disclosure (account existence)\n\n### Recommended Fix\nPerform a dummy bcrypt check when user is not found to ensure consistent response times.",
  "id": "GHSA-6f65-4fv2-wwch",
  "modified": "2026-01-30T19:35:40Z",
  "published": "2026-01-30T19:35:40Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/vendurehq/vendure/security/advisories/GHSA-6f65-4fv2-wwch"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-25050"
    },
    {
      "type": "WEB",
      "url": "https://github.com/vendurehq/vendure/commit/7f0c5556ecddb44a5d5208677a45fdd5923b0cc9"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/vendurehq/vendure"
    },
    {
      "type": "WEB",
      "url": "https://github.com/vendurehq/vendure/releases/tag/v3.5.3"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Vendure vulnerable to timing attack that enables user enumeration in NativeAuthenticationStrategy"
}


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