What’s Vulnerable › Vulnerabilities
CVE-2026-30863: Parse Server: JWT audience validation bypass in Google, Apple, and Facebook authentication adapters
- Severity: critical (CVSS 9.8 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.5% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-03-07 · updated 2026-06-17
- Weakness: CWE-287
Description
Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to versions 8.6.10 and 9.5.0-alpha.11, the Google, Apple, and Facebook authentication adapters use JWT verification to validate identity tokens. When the adapter's audience configuration option is not set (clientId for Google/Apple, appIds for Facebook), JWT verification silently skips audience claim validation. This allows an attacker to use a validly signed JWT issued for a different application to authenticate as any user on the target Parse Server. This issue has been patched in versions 8.6.10 and 9.5.0-alpha.11.
Affected products
- parse-community parse-server: before 8.6.10; from 9.0.0 before 9.5.0; 9.5.0-alpha1, 9.5.0-alpha10, 9.5.0-alpha2, 9.5.0-alpha3, 9.5.0-alpha4, 9.5.0-alpha5 (+4) — fixed in 8.6.10, 9.5.0
How to fix
Upgrade to a fixed version: parse-community parse-server 8.6.10, 9.5.0. Check the vendor advisory for mitigations.
References
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