CVE-2026-34373 MEDIUM

CVE-2026-34373: Parse Server: GraphQL API endpoint ignores CORS origin restriction

Vendor Parse-Community
Product parse-server
Weakness CWE-346 · Origin validation
Published March 31, 2026
Last update March 31, 2026
View on NVD All CVEs

CVSS base score

5.3/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction —
Confidentiality —
Integrity —

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:N/SA:N

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

March 31, 2026 CVE published
March 31, 2026 Record updated