CVE-2026-33409Parse Server: Auth provider validation bypass on login via partial authData
Updated under an hour ago ()
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It affects parse-community parse-server and 1 other product. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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Free account, 1 product
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 (v4.0, CNA)CVSS:4.0/AV:N/AC:H/AT:P/PR:H/UI:A/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
- Weakness (CWE)
- CWE-287
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- GitHub_M
- NVD analysis
- Analyzed
- Record last updated
- Mar 25, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
parse-community parse-server parse_community:parse_server (from the name) | before 8.6.52; from 9.0.0, < 9.6.0-alpha.41 | CNA record |
parseplatform parse-server parseplatform:parse-server | before 8.6.52; from 9.0.0 before 9.6.0; 9.6.0; 9.6.0; 9.6.0; 9.6.0; 9.6.0; 9.6.0; and 34 more ranges | NVD |
References
- https://github.com/parse-community/parse-server/security/advisories/GHSA-pfj7-wv7c-22prx-refsource-confirm, vendor-advisory
- https://github.com/parse-community/parse-server/pull/10246x-refsource-misc, issue-tracking
- https://github.com/parse-community/parse-server/pull/10247x-refsource-misc, issue-tracking
- https://github.com/parse-community/parse-server/commit/8d7df5639c4a35768fe8b78b4580b30e8a74721cx-refsource-misc, patch
- https://github.com/parse-community/parse-server/commit/98f4ba5bcf2c199bfe6225f672e8edcd08ba732dx-refsource-misc, patch
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.