Vulnerability 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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Parseplatform | Parse-Server | < 8.6.18 |
Related Weaknesses (CWE)
References
- https://github.com/parse-community/parse-server/releases/tag/8.6.18ProductRelease Notes
- https://github.com/parse-community/parse-server/releases/tag/9.5.2-alpha.5ProductRelease Notes
- https://github.com/parse-community/parse-server/security/advisories/GHSA-48mh-j4PatchVendor Advisory
FAQ
What is CVE-2026-30949?
CVE-2026-30949 is a vulnerability with a CVSS score of 8.8 (HIGH). 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...
How severe is CVE-2026-30949?
CVE-2026-30949 has been rated HIGH with a CVSS base score of 8.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-30949?
Check the references section above for vendor advisories and patch information. Affected products include: Parseplatform Parse-Server.