CVE-2026-30229

EUVD-2026-10060

06.03.2026, 21:16

Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to versions 8.6.6 and 9.5.0-alpha.4, the readOnlyMasterKey can call POST /loginAs to obtain a valid session token for any user. This allows a read-only credential to impersonate arbitrary users with full read and write access to their data. Any Parse Server deployment that uses readOnlyMasterKey is affected. This issue has been patched in versions 8.6.6 and 9.5.0-alpha.4.

Provider	Type	Base Score	Atk. Vector	Atk. Complexity	Priv. Required	Vector
NIST	Primary	7.2 HIGH	NETWORK	LOW	HIGH	CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Base Score

CVSS 3.x

EPSS Score

Percentile: Unknown

Affected Products (NVD)

Vendor	Product	Version
parseplatform	parse-server	𝑥 < 8.6.6
parseplatform	parse-server	9.0.0 ≤ 𝑥 ≤ 9.4.1
parseplatform	parse-server	9.5.0:alpha1
parseplatform	parse-server	9.5.0:alpha2
parseplatform	parse-server	9.5.0:alpha3

𝑥

= Vulnerable software versions

Common Weakness Enumeration

CWE-863 - Incorrect Authorization
The software performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check. This allows attackers to bypass intended access restrictions.

References

https://github.com/parse-community/parse-server/releases/tag/8.6.6

https://github.com/parse-community/parse-server/releases/tag/9.5.0-alpha.4

https://github.com/parse-community/parse-server/security/advisories/GHSA-79wj-8rqv-jvp5