Login Request a demo
Low severity · published Mar 24, 2026
CVE-2026-33624
Parse Server: MFA recovery code single-use bypass via concurrent requests
2.7
CVSS
0.2%
EPSS
No
On KEV
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
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
High
User interaction
None
Confidentiality
None
Integrity
Low
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 8% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
PA
parse-server · parse-community
< 8.6.60; >= 9.0.0, < 9.6.0-alpha.54 · source: vendor, NVD
Affected product
PA
parse-server
parse-community
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-33624
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-33624
Patch
https://github.com/parse-community/parse-server/commit/5e70094250a36bfcc14ecd49592be2b94fba66ff
Patch
https://github.com/parse-community/parse-server/commit/fc3da35a81d5083b453e8967cabcc880f1a3bd0c
Issue Tracking
https://github.com/parse-community/parse-server/pull/10275
Issue Tracking
https://github.com/parse-community/parse-server/pull/10276
Vendor Advisory
https://github.com/parse-community/parse-server/security/advisories/GHSA-2299-ghjr-6vjp
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