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OpenAdvisories
Low · 2.1 CVE-2026-33624 BIT-parse-2026-33624EUVD-2026-14978GHSA-2299-ghjr-6vjp

Parse Server: MFA recovery code single-use bypass via concurrent requests

Published Mar 24, 2026 · Updated Mar 25, 2026 · Assigned by GitHub_M

Description

Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to versions 8.6.60 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.

Affected products

VendorProductAffectedFixed
parse-community parse-server < 8.6.60, >= 9.0.0, < 9.6.0-alpha.54 —

Affected packages

EcosystemPackageAffectedFixedRecord
npm parse-server >= 9.0.0, < 9.6.0-alpha.54 9.6.0-alpha.54 GHSA-2299-ghjr-6vjp
npm parse-server < 8.6.60 8.6.60 GHSA-2299-ghjr-6vjp

References