CVE-2026-30863

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, 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.

How to fix CVE-2026-30863

To remediate CVE-2026-30863, upgrade the affected package to a fixed version below.

• —upgrade to 9.5.0 or later
• —upgrade to 9.5.0-alpha.11 or later

Is CVE-2026-30863 being exploited?

Low — EPSS is 0.5%, meaning exploitation activity has not been observed at scale.

Affected packages (2)

• from 0, < 9.5.0
• >= 9.0.0-alpha.1, < 9.5.0-alpha.11

CVSS scores

References (3)

• ADVISORYnvd.nist.gov/vuln/detail/CVE-2026-30863
• PATCHgithub.com/parse-community/parse-server
• WEBgithub.com/parse-community/parse-server/security/advisories/GHSA-x6fw-778m-wr9v