CVSS 4.0
7.0 highCVSS:4.0/AV:N/AC:H/AT:P/PR:H/UI:A/VC:H/VI:H/VA:N/SC:N/SI:N/SA:NCVE-2026-33409
High (7.0) in parseplatform parse-server. EPSS 0.5% chance of exploitation in the next 30 days. Fixed in parse-server 8.6.52, 9.6.0-alpha.41.
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.
Severity
CVSS 3.1
9.1 criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N- EPSS
- 0.5% chance of exploitation in the next 30 days; higher than 40% of CVEs (scores of 2026-10-31)
- CWE
- CWE-287
- Published
- Modified
- Record from
- the NVD, synced
Affected
- parseplatform:parse-server
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-pfj7-wv7c-22pr | npm | parse-server | >=9.0.0 <9.6.0-alpha.41 | 9.6.0-alpha.41 |
| GHSA-pfj7-wv7c-22pr | npm | parse-server | <8.6.52 | 8.6.52 |
References
- https://github.com/parse-community/parse-server/commit/8d7df5639c4a35768fe8b78b4580b30e8a74721c
- https://github.com/parse-community/parse-server/commit/98f4ba5bcf2c199bfe6225f672e8edcd08ba732d
- 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/security/advisories/GHSA-pfj7-wv7c-22pr