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CVE-2026-33624

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

Description (CNA)

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 (CNA)

Vendor / productVersions
parse-community / parse-serveraffected < 8.6.60; affected >= 9.0.0, < 9.6.0-alpha.54

CWE

CWE-367

References

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.