Auth bypass in Parse-Community Parse-Server
CVE-2026-30965
Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to 9.5.2-alpha.8 and 8.6.21, a vulnerability in Parse Server's query handling allows an authenticated or unauthenticated attacker to exfiltrate session tokens of other users by exploiting the redirectClassNameForKey query parameter. Exfiltrated session tokens can be used to take over user accounts. The vulnerability requires the attacker to be able to create or update an object with a new relation field, which depends on the Class-Level Permissions of at least one class. This vulnerability is fixed in 9.5.2-alpha.8 and 8.6.21.
Vulnerability class: Broken Access Control
EPSS: 0.013 (69.1th 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
- Parse-community Parse-server — versions >= 9.0.0 < 9.5.2-alpha.8, < 8.6.21
- Parseplatform Parse-server — versions 9.5.2
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM, Mitigation, Vendor Advisory)
- security-advisories@github.com (Product, x_refsource_MISC, Release Notes)
- security-advisories@github.com (Product, x_refsource_MISC, Release Notes)
Frequently asked questions
- What is CVE-2026-30965?
- CVE-2026-30965 is a critical-severity vulnerability in Parse-Community Parse-Server, classified under Incorrect Authorization. CVSS score: 9.1/10. Published 2026-03-10.
- How severe is CVE-2026-30965?
- Critical severity. CVSS v3 base score is 9.1 out of 10.