CVE-2026-33409
CVE-2026-33409 · Parse Server: Auth provider validation bypass on login via partial authData
This page contains facts from public vulnerability sources. Check the original advisory before updating.
Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to versions 8.6.52 and 9.6.0-alpha.41, an authentication bypass vulnerability allows an attacker to log in as any user who has linked a third-party authentication provider, without knowing the user's credentials. The attacker only needs to know the user's provider ID to gain full access to their account, including a valid session token. This affects Parse Server deployments where the server option allowExpiredAuthDataToken is set to true. The default value is false. This issue has been patched in versions 8.6.52 and 9.6.0-alpha.41.
CVSS 7.0 · High · EPSS 0.6% · Fix available
- Published
- Updated
Stack: node
Affected products and versions
parse-server
- Versions
- < 8.6.52: Affected
- >= 9.0.0, < 9.6.0-alpha.41: Affected
No fix published
parse-server npm
- Affected ranges
- SEMVER: ≥ 9.0.0, < 9.6.0-alpha.41
Update to 9.6.0-alpha.41
parse-server npm
- Affected ranges
- SEMVER: < 8.6.52
Update to 8.6.52
Original sources
- https://github.com/parse-community/parse-server/security/advisories/GHSA-pfj7-wv7c-22pr
- https://github.com/parse-community/parse-server/pull/10246
- https://github.com/parse-community/parse-server/pull/10247
- https://github.com/parse-community/parse-server/commit/8d7df5639c4a35768fe8b78b4580b30e8a74721c
- https://github.com/parse-community/parse-server/commit/98f4ba5bcf2c199bfe6225f672e8edcd08ba732d
- https://nvd.nist.gov/vuln/detail/CVE-2026-33409