CVE-2026-33624
LOWParse Server: MFA recovery code single-use bypass via concurrent requests
Title source: cnaDescription
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.
Scores
CVSS v3
2.7
EPSS
0.0004
EPSS Percentile
10.6%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:N
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
partial
Details
CWE
CWE-367
Status
published
Products (4)
npm/parse-server
9.0.0 - 9.6.0-alpha.54npm
parse-community/parse-server
< 8.6.60
parse-community/parse-server
>= 9.0.0, < 9.6.0-alpha.54
parseplatform/parse-server
9.6.0 alpha1 (47 CPE variants)
Published
Mar 24, 2026
Tracked Since
Mar 25, 2026