CVE-2025-48370: @supabase/auth js Auth-js Vulnerable To Insecure Path Vulnerability

LOW
Advisory Identifier: GHSA-8r88-6cj9-9fh5
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CWE-22
Published
Advisory Summary

CVE-2025-48370 is a LOW auth-js vulnerable to insecure path vulnerability (CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')) affecting @supabase/auth js libraries in the npm ecosystem. The issue involves auth-js vulnerable to insecure path routing from malformed user input. Remediation is available by upgrading affected packages to version 2.70.0.

CVE-2025-48370 at a Glance

CVE Identifier CVE-2025-48370
GHSA Identifier GHSA-8r88-6cj9-9fh5
Severity LOW
CVSS v3.1 Base Score N/A
CWE Classification CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Affected Product @supabase/auth js
Package Ecosystem npm
Published Date
Last Updated

How to Fix CVE-2025-48370

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

@supabase/auth-js fixed: 2.70.0 
npm install @supabase/auth-js@2.70.0
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 @supabase/auth-js

How to Check if You Are Affected

To determine whether your Node.js application is affected by CVE-2025-48370, inspect your project dependencies using npm:

npm ls @supabase/auth-js

Analyze the terminal output to locate any version of @supabase/auth js in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 2.70.0), your application is affected.

Note: The npm ls @supabase/auth-js 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-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal'), where the product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. In @supabase/auth js, 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

### Impact The library functions `getUserById`, `deleteUser`, `updateUserById`, `listFactors` and `deleteFactor` did not require the user supplied values to be valid UUIDs. This could lead to a URL path traversal, resulting in the wrong API function being called. Implementations that follow security best practice and validate user controlled inputs, such as the `userId` are not affected by this. ### Patches Strict value checks have been added to all affected functions. These functions now require that the `userId` and `factorId` parameters MUST be valid UUID (v4). **Patched version:** >= 2.69.1 ### Workarounds Implementations that follow security best practice and validate user controlled inputs, such as the `userId` are not affected by this. It is recommended that users of the auth-js library always follow security best practice and validate all inputs, before passing these to other functions or libraries. ### References https://github.com/supabase/auth-js/pull/1063

CVE-2025-48370 Affected @supabase/auth js Versions

1 component(s)
Fixed Versions:
2.70.0
Product / Package Ecosystem Affected Versions Fixed Version
@supabase/auth-js
npm/@supabase/auth-js
npm
< 2.70.0
2.70.0

References

GitHub Advisory / Wiki ADVISORY
https://github.com/supabase/auth-js/security/advisories/GHSA-8r88-6cj9-9fh5
NVD — CVE-2025-48370 NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-48370
@supabase/auth js Source Repository REPOSITORY
https://github.com/supabase/auth-js/pull/1063
Security Fix Commit FIX COMMIT
https://github.com/supabase/auth-js/commit/1bcb76e479e51cd9bca2d7732d0bf3199e07a693
@supabase/auth js Source Repository REPOSITORY
https://github.com/supabase/auth-js

Frequently Asked Questions

What is CVE-2025-48370?
CVE-2025-48370 is a security vulnerability in @supabase/auth js involving auth-js Vulnerable to Insecure Path Routing from Malformed User Input under CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal').
Which @supabase/auth js versions are affected?
Affected versions include releases prior to 2.70.0 across affected packages: @supabase/auth-js.
What version fixes CVE-2025-48370?
Upgrading to 2.70.0 (or the latest patched release for your respective branch) resolves the vulnerability.
Is @supabase/auth-js affected?
Yes, @supabase/auth-js is affected in releases prior to 2.70.0. Upgrade your dependency to 2.70.0 or later.
What CWE is associated with CVE-2025-48370?
CVE-2025-48370 is classified under CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') (The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.).
How can I check npm dependencies for CVE-2025-48370?
Run the dependency tree command: 'npm ls @supabase/auth-js'. 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-8r88-6cj9-9fh5",
  "modified" : "2026-05-05T17:59:54Z",
  "published" : "2025-05-27T18:00:17Z",
  "aliases" : [ "CVE-2025-48370" ],
  "summary" : "auth-js Vulnerable to Insecure Path Routing from Malformed User Input",
  "details" : "### Impact\nThe library functions `getUserById`, `deleteUser`, `updateUserById`, `listFactors` and `deleteFactor` did not require the user supplied values to be valid UUIDs. This could lead to a URL path traversal, resulting in the wrong API function being called.\n\nImplementations that follow security best practice and validate user controlled inputs, such as the `userId` are not affected by this.\n\n### Patches\nStrict value checks have been added to all affected functions. These functions now require that the `userId` and `factorId` parameters MUST be valid UUID (v4).\n\n**Patched version:** >= 2.69.1\n\n### Workarounds\nImplementations that follow security best practice and validate user controlled inputs, such as the `userId` are not affected by this. It is recommended that users of the auth-js library always follow security best practice and validate all inputs, before passing these to other functions or libraries.\n\n### References\nhttps://github.com/supabase/auth-js/pull/1063",
  "severity" : [ {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "npm",
      "name" : "@supabase/auth-js"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "2.70.0"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 2.69.1"
    }
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/supabase/auth-js/security/advisories/GHSA-8r88-6cj9-9fh5"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2025-48370"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/supabase/auth-js/pull/1063"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/supabase/auth-js/commit/1bcb76e479e51cd9bca2d7732d0bf3199e07a693"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/supabase/auth-js"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-22" ],
    "severity" : "LOW",
    "github_reviewed" : true,
    "github_reviewed_at" : "2025-05-27T18:00:17Z",
    "nvd_published_at" : "2025-05-27T16:15:32Z"
  }
}