CVE-2026-34224CWE-367

Parse Server: MFA single-use token bypass via concurrent authData login requests

Low · published March 31, 2026

CVSS v4.0
2.1
EPSS
0%
Percentile
26.5
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v4.0
2.1 · LOW
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
EPSS
0.00342 · 26.5th percentile
Weakness
CWE-367 · Time-of-check Time-of-use (TOCTOU) Race Condition
Published
2026-03-31T14:25Z
EPSS history
Timeline
  • 31 MAR 14:25Z
    Parse Server: MFA single-use token bypass via concurrent authData login requests
    cvelistv5