Node.js CVE-2026-30229
HIGH
GHSA-79wj-8rqv-jvp5
Severity by source
AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Primary rating from GitHub Advisory · only source for this CVE.
CVSS VectorGitHub Advisory
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Lifecycle Timeline
3DescriptionGitHub Advisory
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.
AnalysisAI
Improper authorization in Parse Server versions prior to 8.6.6 and 9.5.0-alpha.4 allows read-only master key holders to bypass access controls via the /loginAs endpoint and obtain valid session tokens for arbitrary users. An attacker with readOnlyMasterKey credentials can impersonate any user and gain full read and write access to their data. All Parse Server deployments utilizing readOnlyMasterKey functionality are affected, and no patch is currently available.
Technical ContextAI
Classified as CWE-863 (Incorrect Authorization). Affects Parse-Server. 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.
RemediationAI
Monitor vendor advisories for a patch. Restrict network access to the affected service where possible.
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Same weakness CWE-863 – Incorrect Authorization
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External POC / Exploit Code
Leaving vuln.today