Categories
CVE-2026-27804

Parse Server: Account takeover via JWT algorithm confusion in Google auth adapter

Summary

Parse Server: Account takeover via JWT algorithm confusion in Google auth adapter

Original description

The description as published by the source.

Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to versions 8.6.3 and 9.1.1-alpha.4, an unauthenticated attacker can forge a Google authentication token with alg: "none" to log in as any user linked to a Google account, without knowing their credentials. All deployments with Google authentication enabled are affected. The fix in versions 8.6.3 and 9.1.1-alpha.4 hardcodes the expected RS256 algorithm instead of trusting the JWT header, and replaces the Google adapter's custom key fetcher with jwks-rsa which rejects unknown key IDs. As a workaround, dsable Google authentication until upgrading is possible.

Source: OSV.dev (Open Source Vulnerabilities) NVD GitHub Advisory OSV

Affected packages

Bitnami parse
[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"8.6.3"},{"introduced":"9.0.0"},{"fixed":"9.3.1"}]}]

References

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