CVE-2026-34373

moderate-risk
Published 2026-03-31

Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to versions 8.6.66 and 9.7.0-alpha.10, the GraphQL API endpoint does not respect the allowOrigin server option and unconditionally allows cross-origin requests from any website. This bypasses origin restrictions that operators configure to control which websites can interact with the Parse Server API. The REST API correctly enforces the configured allowOrigin restriction. This issue has been patched in versions 8.6.66 and 9.7.0-alpha.10.

Do I need to act?

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0.02% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
8
CVSS 8.8/10 High
NETWORK / LOW complexity

Affected Products (10)

Affected Vendors

Parseplatform

References (5)

Patch https://github.com/parse-community/parse-server/commit/0347641507891d0013ec57f7c...
Patch https://github.com/parse-community/parse-server/commit/4dd0d3d8be1c39664c74ad10b...
Issue Tracking https://github.com/parse-community/parse-server/pull/10334
Issue Tracking https://github.com/parse-community/parse-server/pull/10335
Patch https://github.com/parse-community/parse-server/security/advisories/GHSA-q3p6-g7...
46
/ 100
moderate-risk
Severity 30/34 · Critical
Exploitability 0/34 · Minimal
Exposure 16/34 · Moderate