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Description

Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to versions 8.6.7 and 9.5.0-alpha.6, malformed $regex query parameter (e.g. [abc) causes the database to return a structured error object that is passed unsanitized through the API response. This leaks database internals such as error messages, error codes, code names, cluster timestamps, and topology details. The vulnerability is exploitable by any client that can send query requests, depending on the deployment's permission configuration. This issue has been patched in versions 8.6.7 and 9.5.0-alpha.6.

PUBLISHED Reserved 2026-03-05 | Published 2026-03-06 | Updated 2026-03-06 | Assigner GitHub_M




MEDIUM: 6.9CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N

Problem types

CWE-209: Generation of Error Message Containing Sensitive Information

Product status

< 8.6.7
affected

< 9.5.0-alpha.6
affected

References

github.com/...server/security/advisories/GHSA-9cp7-3q5w-j92g

github.com/parse-community/parse-server/releases/tag/8.6.7

github.com/...munity/parse-server/releases/tag/9.5.0-alpha.6

cve.org (CVE-2026-30835)

nvd.nist.gov (CVE-2026-30835)

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