GHSA-fr88-w35c-r596

Source

https://github.com/advisories/GHSA-fr88-w35c-r596

Import Source

https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/03/GHSA-fr88-w35c-r596/GHSA-fr88-w35c-r596.json

JSON Data

https://api.osv.dev/v1/vulns/GHSA-fr88-w35c-r596

Aliases

Published

2026-03-11T00:21:37Z

Modified

2026-03-14T03:41:18Z

Severity

7.6 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N CVSS Calculator

Summary

Parse Server OAuth2 authentication adapter account takeover via identity spoofing

Details

Impact

The OAuth2 authentication adapter, when configured without the useridField option, only verifies that a token is active via the provider's token introspection endpoint, but does not verify that the token belongs to the user identified by authData.id. An attacker with any valid OAuth2 token from the same provider can authenticate as any other user.

This affects any Parse Server deployment that uses the generic OAuth2 authentication adapter (configured with oauth2: true) without setting the useridField option.

Patches

The vulnerability is fixed by defaulting useridField to sub, which is the standard subject identifier field defined by RFC 7662. The adapter now always validates the token's identity against the claimed user ID, even when useridField is not explicitly configured.

Workarounds

Set the useridField option to the appropriate field name for your OAuth2 provider (e.g. sub) in the Parse Server authentication configuration.

References

GitHub security advisory: https://github.com/parse-community/parse-server/security/advisories/GHSA-fr88-w35c-r596
Fix Parse Server 9: https://github.com/parse-community/parse-server/releases/tag/9.5.2-alpha.9
Fix Parse Server 8: https://github.com/parse-community/parse-server/releases/tag/8.6.22

Database specific

{
    "cwe_ids": [
        "CWE-287"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-03-11T00:21:37Z",
    "nvd_published_at": "2026-03-10T21:16:49Z",
    "severity": "HIGH"
}

References

Affected packages

npm / parse-server

Package

Name: parse-server; View open source insights on deps.dev
Purl: pkg:npm/parse-server

Affected ranges

Type: SEMVER
Events: Introduced

9.0.0-alpha.1

Fixed

9.5.2-alpha.9

Database specific

source

"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/03/GHSA-fr88-w35c-r596/GHSA-fr88-w35c-r596.json"

npm / parse-server

Package

Name: parse-server; View open source insights on deps.dev
Purl: pkg:npm/parse-server

Affected ranges

Type: SEMVER
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Fixed

8.6.22

Database specific

source

"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/03/GHSA-fr88-w35c-r596/GHSA-fr88-w35c-r596.json"