CVE-2026-29182

Description

Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to versions 8.6.4 and 9.4.1, Parse Server's readOnlyMasterKey option allows access with master-level read privileges but is documented to deny all write operations. However, some endpoints incorrectly accept the readOnlyMasterKey for mutating operations. This allows a caller who only holds the readOnlyMasterKey to create, modify, and delete Cloud Hooks and to start Cloud Jobs, which can be used for data exfiltration. Any Parse Server deployment that uses the readOnlyMasterKey option is affected. Note than an attacker needs to know the readOnlyMasterKey to exploit this vulnerability. This issue has been patched in versions 8.6.4 and 9.4.1.

How to fix CVE-2026-29182

To remediate CVE-2026-29182, upgrade the affected package to a fixed version below.

• —upgrade to 9.4.1 or later
• —upgrade to 9.4.1-alpha.3 or later

Is CVE-2026-29182 being exploited?

Low — EPSS is 0.4%, meaning exploitation activity has not been observed at scale.

Affected packages (2)

• from 0, < 9.4.1
• >= 9.0.0, < 9.4.1-alpha.3

CVSS scores

References (5)

• ADVISORYnvd.nist.gov/vuln/detail/CVE-2026-29182
• PATCHgithub.com/parse-community/parse-server
• WEBgithub.com/parse-community/parse-server/releases/tag/8.6.4
• WEBgithub.com/parse-community/parse-server/releases/tag/9.4.1-alpha.3