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Description

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.

PUBLISHED Reserved 2026-03-19 | Published 2026-03-24 | Updated 2026-03-25 | Assigner GitHub_M




HIGH: 7.0CVSS:4.0/AV:N/AC:H/AT:P/PR:H/UI:A/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N

Problem types

CWE-287: Improper Authentication

Product status

< 8.6.52
affected

>= 9.0.0, < 9.6.0-alpha.41
affected

References

github.com/...server/security/advisories/GHSA-pfj7-wv7c-22pr

github.com/parse-community/parse-server/pull/10246

github.com/parse-community/parse-server/pull/10247

github.com/...ommit/8d7df5639c4a35768fe8b78b4580b30e8a74721c

github.com/...ommit/98f4ba5bcf2c199bfe6225f672e8edcd08ba732d

cve.org (CVE-2026-33409)

nvd.nist.gov (CVE-2026-33409)

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