# CVE-2026-31875

## Summary

- **CVE ID:** CVE-2026-31875
- **Severity:** HIGH
- **CVSS Score:** 8.2 (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)
- **CWE:** CWE-672
- **Published:** Mar 11, 2026
- **Last Modified:** Mar 12, 2026

## 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.

## Affected Products

- parse-community — parse-server (>= 9.0.0 < 9.6.0-alpha.7)
- parse-community — parse-server (< 8.6.33)

## References

- [CNA](https://github.com/parse-community/parse-server/security/advisories/GHSA-4hf6-3x24-c9m8)
- [CNA](https://github.com/parse-community/parse-server/releases/tag/8.6.33)
- [CNA](https://github.com/parse-community/parse-server/releases/tag/9.6.0-alpha.7)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.44%
- **EPSS Percentile:** 36.9

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-10._