CVE-2026-31875
EPSS 0.14%Parse Server's MFA recovery codes not consumed after use
Description
### Impact 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. ### Patches The fix ensures that each recovery code is removed from the stored recovery code list after a successful login. ### Workarounds There is no known workaround. ### References - GitHub security advisory: https://github.com/parse-community/parse-server/security/advisories/GHSA-4hf6-3x24-c9m8 - Fix Parse Server 9: https://github.com/parse-community/parse-server/releases/tag/9.6.0-alpha.7 - Fix Parse Server 8: https://github.com/parse-community/parse-server/releases/tag/8.6.33
Affected packages (2)
- Bitnami/parsefrom 0, < 8.6.33, >= 9.0.0, < 9.6.0
- npm/parse-server>= 9.0.0-alpha.1, < 9.6.0-alpha.7
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 4.0 | — | CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N |
References (5)
- ADVISORYhttps://nvd.nist.gov/vuln/detail/CVE-2026-31875
- PATCHhttps://github.com/parse-community/parse-server
- WEBhttps://github.com/parse-community/parse-server/releases/tag/8.6.33
- WEBhttps://github.com/parse-community/parse-server/releases/tag/9.6.0-alpha.7
- WEBhttps://github.com/parse-community/parse-server/security/advisories/GHSA-4hf6-3x24-c9m8