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OpenAdvisories
High · 8.5 CVE-2026-30229 BIT-parse-2026-30229EUVD-2026-10060GHSA-79wj-8rqv-jvp5

Parse Server: Endpoint `/loginAs` allows `readOnlyMasterKey` to gain full read and write access as any user

Published Mar 6, 2026 · Updated Mar 9, 2026 · Assigned by GitHub_M

Description

Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to versions 8.6.6 and 9.5.0-alpha.4, the readOnlyMasterKey can call POST /loginAs to obtain a valid session token for any user. This allows a read-only credential to impersonate arbitrary users with full read and write access to their data. Any Parse Server deployment that uses readOnlyMasterKey is affected. This issue has been patched in versions 8.6.6 and 9.5.0-alpha.4.

Affected products

VendorProductAffectedFixed
parse-community parse-server < 8.6.6, < 9.5.0-alpha.4 —

Affected packages

EcosystemPackageAffectedFixedRecord
npm parse-server < 8.6.6 8.6.6 GHSA-79wj-8rqv-jvp5
npm parse-server >= 9.0.0, < 9.5.0-alpha.4 9.5.0-alpha.4 GHSA-79wj-8rqv-jvp5

References