CVE-2026-31875 Parse Server MFA recovery codes not consumed after use
Attackers can reuse MFA recovery codes indefinitely to bypass authentication and take over user accounts in Parse Server.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-31875?
CVE-2026-31875 is a high-severity vulnerability in Parseplatform Parse-Server, published on 11 Mar 2026. An attacker can exploit it over the internet without logging in, 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 9.6.0-alpha.7 and 8.6.33, when multi-factor authentication (MFA) via TOTP is enabled for a user account, Parse Server generates two single-use recovery codes. These codes are intended as a fallback when the user cannot provide a TOTP token. However, recovery codes are not consumed after use, allowing the same recovery code to be used an unlimited number of times. This defeats the single-use design of recovery codes and weakens the security of MFA-protected accounts. An attacker who obtains a single recovery code can repeatedly authenticate as the affected user without the code ever being invalidated. This vulnerability is fixed in 9.6.0-alpha.7 and 8.6.33.
Weakness: CWE-672
Which versions are affected by CVE-2026-31875?
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 | 8.6.33 |
parse-server npm | All versions | 8.6.33 |
parse-server npm | From 9.0.0-alpha.1 | 9.6.0-alpha.7 |
parse-server npm | From 9.0.0-alpha.1 | 9.6.0-alpha.7 |
parse Bitnami | All versions | 8.6.33, 9.6.0 |
Products include Parseplatform Parse-Server.
How do I fix CVE-2026-31875?
Upgrade parse-server to a fixed version for your release line: 8.6.33 or 9.6.0-alpha.7.
Is CVE-2026-31875 being exploited?
There is no known exploitation of CVE-2026-31875 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-2026-31875, GHSA-4hf6-3x24-c9m8.