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CVE-2026-33624

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

Published: Mar 24, 2026Updated: Mar 25, 2026 Sources: CVE List NVDCWE-367
NVD MITRE
2.7CVSSLOW
EPSS Score
0.2%
Top 92.9%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

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.

CVSS Vector Breakdown

AV:NAC:LPR:HUI:NS:UC:NI:LA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:HPrivileges Required
High
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:LIntegrity
Low
A:NAvailability
None
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Weaknesses

CWE-367

Affected Products

parse-serverparse-community
LibraryLibrary
OSS Libraries / npm
parse-serverparseplatform
LibraryLibrary
OSS Libraries / generic-library
parse-communityoss-projectOSS Librariesaka parse, parse server, parse-server
parseplatformoss-projectOSS Librariesaka parse platform

Attack Graph

Products CVE Techniques Tactics

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Exploitability

Official Patch Available

MITRE ATT&CK

1 technique
Privilege Escalation
View detailed technique mapping

References

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
and 2 more references View all →

Timeline

Published
Mar 24, 2026
Last Updated
Mar 25, 2026

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