CVE-2026-30949
Parse Server is missing audience validation in Keycloak authentication adapter
Description
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.5 and 8.6.18, the Keycloak authentication adapter does not validate the azp (authorized party) claim of Keycloak access tokens against the configured client-id. A valid access token issued by the same Keycloak realm for a different client application can be used to authenticate as any user on the Parse Server that uses the Keycloak adapter. This enables cross-application account takeover in multi-client Keycloak realms. All Parse Server deployments that use the Keycloak authentication adapter with a Keycloak realm that has multiple client applications are affected. This vulnerability is fixed in 9.5.2-alpha.5 and 8.6.18.
INFO
Published Date :
March 10, 2026, 9:16 p.m.
Last Modified :
March 11, 2026, 7:40 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 9.5.2-alpha.5 or later.
- Update Parse Server to version 8.6.18 or later.
- Ensure Keycloak client IDs are validated correctly.
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-2026-30949.
| URL | Resource |
|---|---|
| https://github.com/parse-community/parse-server/releases/tag/8.6.18 | Product Release Notes |
| https://github.com/parse-community/parse-server/releases/tag/9.5.2-alpha.5 | Product Release Notes |
| https://github.com/parse-community/parse-server/security/advisories/GHSA-48mh-j4p5-7j9v | Patch 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-2026-30949 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-2026-30949
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-2026-30949 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-30949 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:L/UI:N/S:U/C:H/I:H/A:H Added CPE Configuration OR *cpe:2.3:a:parseplatform:parse-server:9.5.2:alpha1:*:*:*:node.js:*:* *cpe:2.3:a:parseplatform:parse-server:9.5.2:alpha2:*:*:*:node.js:*:* *cpe:2.3:a:parseplatform:parse-server:9.5.2:alpha3:*:*:*:node.js:*:* *cpe:2.3:a:parseplatform:parse-server:9.5.2:alpha4:*:*:*:node.js:*:* *cpe:2.3:a:parseplatform:parse-server:*:*:*:*:*:node.js:*:* versions from (including) 9.0.0 up to (excluding) 9.5.2 *cpe:2.3:a:parseplatform:parse-server:*:*:*:*:*:node.js:*:* versions up to (excluding) 8.6.18 Added Reference Type GitHub, Inc.: https://github.com/parse-community/parse-server/releases/tag/8.6.18 Types: Product, Release Notes Added Reference Type GitHub, Inc.: https://github.com/parse-community/parse-server/releases/tag/9.5.2-alpha.5 Types: Product, Release Notes Added Reference Type GitHub, Inc.: https://github.com/parse-community/parse-server/security/advisories/GHSA-48mh-j4p5-7j9v Types: Patch, Vendor Advisory -
New CVE Received by [email protected]
Mar. 10, 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 9.5.2-alpha.5 and 8.6.18, the Keycloak authentication adapter does not validate the azp (authorized party) claim of Keycloak access tokens against the configured client-id. A valid access token issued by the same Keycloak realm for a different client application can be used to authenticate as any user on the Parse Server that uses the Keycloak adapter. This enables cross-application account takeover in multi-client Keycloak realms. All Parse Server deployments that use the Keycloak authentication adapter with a Keycloak realm that has multiple client applications are affected. This vulnerability is fixed in 9.5.2-alpha.5 and 8.6.18. Added CVSS V4.0 AV:N/AC:L/AT:P/PR:L/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-287 Added Reference https://github.com/parse-community/parse-server/releases/tag/8.6.18 Added Reference https://github.com/parse-community/parse-server/releases/tag/9.5.2-alpha.5 Added Reference https://github.com/parse-community/parse-server/security/advisories/GHSA-48mh-j4p5-7j9v