Vulnerability · Published Mar 31, 2026 · Assigned by GitHub_M

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

Medium 4.4

In plain English

A medium-severity security flaw in parse-server from parse-community. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 25% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)4.4Medium

Exploit odds (30 days)0.3%top 75.3% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
npm	parse-server	9.7.0-alpha.8	GHSA-w73w-g5xw-rwhf
npm	parse-server	8.6.64	GHSA-w73w-g5xw-rwhf

Affected products (as reported)

Vendor	Product	Versions
parse-community	parse-server	< 8.6.64>= 9.0.0, < 9.7.0-alpha.8

Weakness: CWE-367 · Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:H/A:N

References

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