CVE-2026-30229
Parse Server: Endpoint `/loginAs` allows `readOnlyMasterKey` to gain full read and write access as any user
Description
Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to versions 8.6.6 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.
INFO
Published Date :
March 6, 2026, 9:16 p.m.
Last Modified :
March 11, 2026, 12:37 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | HIGH | [email protected] | ||||
| CVSS 4.0 | HIGH | [email protected] |
Solution
- Update Parse Server to version 8.6.6 or later.
- Update Parse Server to version 9.5.0-alpha.4 or later.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-30229.
| URL | Resource |
|---|---|
| https://github.com/parse-community/parse-server/releases/tag/8.6.6 | Release Notes Product |
| https://github.com/parse-community/parse-server/releases/tag/9.5.0-alpha.4 | Release Notes Product |
| https://github.com/parse-community/parse-server/security/advisories/GHSA-79wj-8rqv-jvp5 | Vendor Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-30229 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-30229
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-30229 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-30229 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Mar. 11, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H Added CPE Configuration OR *cpe:2.3:a:parseplatform:parse-server:9.5.0:alpha1:*:*:*:node.js:*:* *cpe:2.3:a:parseplatform:parse-server:9.5.0:alpha2:*:*:*:node.js:*:* *cpe:2.3:a:parseplatform:parse-server:9.5.0:alpha3:*:*:*:node.js:*:* *cpe:2.3:a:parseplatform:parse-server:*:*:*:*:*:node.js:*:* versions up to (excluding) 8.6.6 *cpe:2.3:a:parseplatform:parse-server:*:*:*:*:*:node.js:*:* versions from (including) 9.0.0 up to (including) 9.4.1 Added Reference Type GitHub, Inc.: https://github.com/parse-community/parse-server/releases/tag/8.6.6 Types: Product, Release Notes Added Reference Type GitHub, Inc.: https://github.com/parse-community/parse-server/releases/tag/9.5.0-alpha.4 Types: Product, Release Notes Added Reference Type GitHub, Inc.: https://github.com/parse-community/parse-server/security/advisories/GHSA-79wj-8rqv-jvp5 Types: Vendor Advisory -
New CVE Received by [email protected]
Mar. 06, 2026
Action Type Old Value New Value Added Description Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to versions 8.6.6 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. Added CVSS V4.0 AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Added CWE CWE-863 Added Reference https://github.com/parse-community/parse-server/releases/tag/8.6.6 Added Reference https://github.com/parse-community/parse-server/releases/tag/9.5.0-alpha.4 Added Reference https://github.com/parse-community/parse-server/security/advisories/GHSA-79wj-8rqv-jvp5