CVE-2026-33624
Parse Server: MFA recovery code single-use bypass via concurrent requests
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
11th
Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to versions 8.6.60 and 9.6.0-alpha.54, an attacker who obtains a user's password and a single MFA recovery code can reuse that recovery code an unlimited number of times by sending concurrent login requests. This defeats the single-use design of recovery codes. The attack requires the user's password, a valid recovery code, and the ability to send concurrent requests within milliseconds. This issue has been patched in versions 8.6.60 and 9.6.0-alpha.54.
| CWE | CWE-367 |
| Vendor | parse-community |
| Product | parse-server |
| Published | Mar 24, 2026 |
| Last Updated | Mar 25, 2026 |
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Affected Versions
parse-community / parse-server
< 8.6.60 >= 9.0.0, < 9.6.0-alpha.54
References
github.com: https://github.com/parse-community/parse-server/security/advisories/GHSA-2299-ghjr-6vjp github.com: https://github.com/parse-community/parse-server/pull/10275 github.com: https://github.com/parse-community/parse-server/pull/10276 github.com: https://github.com/parse-community/parse-server/commit/5e70094250a36bfcc14ecd49592be2b94fba66ff github.com: https://github.com/parse-community/parse-server/commit/fc3da35a81d5083b453e8967cabcc880f1a3bd0c