CVE-2026-33624
CVE-2026-33624 · Parse Server: MFA recovery code single-use bypass via concurrent requests
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 8.6.60 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.
CVSS 2.1 · Low · EPSS 0.3% · Fix available
- Published
- Updated
Stack: node
Affected products and versions
parse-server
- Versions
- < 8.6.60: Affected
- >= 9.0.0, < 9.6.0-alpha.54: Affected
No fix published
parse-server npm
- Affected ranges
- SEMVER: ≥ 9.0.0, < 9.6.0-alpha.54
Update to 9.6.0-alpha.54
parse-server npm
- Affected ranges
- SEMVER: < 8.6.60
Update to 8.6.60
Original sources
- https://github.com/parse-community/parse-server/security/advisories/GHSA-2299-ghjr-6vjp
- https://github.com/parse-community/parse-server/pull/10275
- https://github.com/parse-community/parse-server/pull/10276
- https://github.com/parse-community/parse-server/commit/5e70094250a36bfcc14ecd49592be2b94fba66ff
- https://github.com/parse-community/parse-server/commit/fc3da35a81d5083b453e8967cabcc880f1a3bd0c
- https://nvd.nist.gov/vuln/detail/CVE-2026-33624