parse-server: MFA SMS one-time password accepted twice under concurrent login

Impact A race condition in the MFA SMS one-time password OTP login path allows two concurrent /login requests carrying the same OTP to both succeed and both receive valid session tokens, breaking the single-use property of the OTP. The vulnerability requires the attacker to already possess the...

PT-2026-37307

Name of the Vulnerable Software and Affected Versions Parse Server versions prior to 8.6.76 Parse Server versions prior to 9.9.0-alpha.2 Description A race condition exists in the MFA SMS one-time password OTP login path. This allows two concurrent requests to the '/login' endpoint using the same...

GHSA-W73W-G5XW-RWHF Parse Server has an MFA single-use token bypass via concurrent authData login requests

Impact 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 cod...

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

Impact 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 cod...

PT-2026-28613

Name of the Vulnerable Software and Affected Versions Parse Server versions prior to 8.6.64 Parse Server versions prior to 9.7.0-alpha.8 Description Parse Server is an open source backend deployable on Node.js infrastructure. An attacker with a valid authentication provider token and a single MFA...

GHSA-2299-GHJR-6VJP Parse Server: MFA recovery code single-use bypass via concurrent requests

Impact An attacker who obtains a user's password and a single MFA recovery code can reuse that recovery code an unlimited number of times by sending concurrent login requests. This defeats the single-use design of recovery codes. The attack requires the user's password, a valid recovery code, and...

Parse Server: MFA recovery code single-use bypass via concurrent requests

Impact An attacker who obtains a user's password and a single MFA recovery code can reuse that recovery code an unlimited number of times by sending concurrent login requests. This defeats the single-use design of recovery codes. The attack requires the user's password, a valid recovery code, and...

PT-2026-24478

Name of the Vulnerable Software and Affected Versions Sylius versions 1.9.12, 1.10.16, 1.11.17, 1.12.23, 1.13.15, 1.14.18, 2.0.16, 2.1.12, and 2.2.3 and above Description Sylius, an Open Source eCommerce Framework on Symfony, contains a Time-of-Check To Time-of-Use TOCTOU race condition in the...