CVE-2026-33624 Parse Server: MFA recovery code single-use bypass via concurrent requests
Attackers can reuse MFA recovery codes indefinitely via concurrent requests, bypassing single-use restrictions and potentially taking over accounts.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-33624?
CVE-2026-33624 is a low-severity vulnerability in Parseplatform Parse-Server, published on 24 Mar 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Official 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.
Weakness: CWE-367
Which versions are affected by CVE-2026-33624?
5 open source packages ship an affected version, including parse-server and parse. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
parse-server npm | All versions | 8.6.60 |
parse-server npm | All versions | 8.6.60 |
parse-server npm | From 9.0.0 | 9.6.0-alpha.54 |
parse-server npm | From 9.0.0 | 9.6.0-alpha.54 |
parse Bitnami | All versions | 8.6.60, 9.6.0 |
Products include Parseplatform Parse-Server.
How do I fix CVE-2026-33624?
Upgrade parse-server to a fixed version for your release line: 8.6.60 or 9.6.0-alpha.54.
Is CVE-2026-33624 being exploited?
There is no known exploitation of CVE-2026-33624 in the wild and no public exploit code.
Other vulnerabilities in Parseplatform Parse-Server
- CVE-2026-30966 Parse Server role escalation and CLP bypass via direct `_Join` table write
- CVE-2024-27298 Parse Server literalizeRegexPart SQL Injection
- CVE-2022-24760 Command Injection in Parse server
- CVE-2026-30965 Parse Server session token exfiltration via `redirectClassNameForKey` query parameter
- CVE-2023-36475 Parse Server vulnerable to remote code execution via MongoDB BSON parser through prototype pollution
Sources
Also known as BIT-parse-2026-33624, GHSA-2299-ghjr-6vjp.