Auth bypass in Parse-community Parse-server

CVE-2026-33409

Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to versions 8.6.52 and 9.6.0-alpha.41, an authentication bypass vulnerability allows an attacker to log in as any user who has li…

Vulnerability class: Broken Authentication

EPSS: 0.005 (36.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N.

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-33409?
CVE-2026-33409 is a critical-severity vulnerability in Parse-community Parse-server, classified under Improper Authentication. CVSS score: 9.1/10. Published 2026-03-24.
How severe is CVE-2026-33409?
Critical severity. CVSS v3 base score is 9.1 out of 10.