CVE-2026-30949 Details
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.
A vulnerability exists in the Keycloak authentication adapter of Parse Server, specifically in versions prior to 9.5.2-alpha.5 and 8.6.18. The issue arises because the adapter fails to validate the 'azp' (authorized party) claim of Keycloak access tokens against the configured client ID. As a result, a valid access token from the same Keycloak realm but issued for a different client application can be used to authenticate as any user on the Parse Server that utilizes the Keycloak adapter. This flaw facilitates cross-application account takeover in multi-client Keycloak realms. All Parse Server deployments using the Keycloak authentication adapter in such a Keycloak environment are affected.
Users can upgrade to Parse Server versions 9.5.2-alpha.5 or 8.6.18 to address this vulnerability.
Metrics
CVSS 4.0 Severity and Vector Strings:
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Mar 10, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/parse-community/parse-server/releases/tag/8.6.18 | [email protected] | ProductRelease Notes |
| https://github.com/parse-community/parse-server/releases/tag/9.5.2-alpha.5 | [email protected] | ProductRelease Notes |
| https://github.com/parse-community/parse-server/security/advisories/GHSA-48mh-j4p5-7j9v | [email protected] | PatchVendor Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-287 | Improper Authentication | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| parseplatform parse-server | < 8.6.18 >= 9.0.0, < 9.5.2 9.5.2 alpha1 9.5.2 alpha2 9.5.2 alpha3 9.5.2 alpha4 |
CPE
Remediation
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Change History
4 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Mar 11, 2026 | Initial Analysis | [email protected] |
| Mar 10, 2026 | New CVE Received | [email protected] |