CVE-2026-32886

Description

Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to 9.6.0 and 8.6.47, remote clients can crash the Parse Server process by calling a cloud function endpoint with a crafted function name that traverses the JavaScript prototype chain of a registered cloud function handler, causing a stack overflow. The fix in versions 9.6.0 and 8.6.47 restricts property lookups during cloud function name resolution to own properties only, preventing prototype chain traversal from stored function handlers. There is no known workaround.

How to fix CVE-2026-32886

To remediate CVE-2026-32886, upgrade the affected package to a fixed version below.

• —upgrade to 8.6.47 or later
• —upgrade to 9.6.0-alpha.24 or later

Is CVE-2026-32886 being exploited?

Low — EPSS is 0.5%, meaning exploitation activity has not been observed at scale.

Affected packages (2)

• from 0, < 8.6.47, >= 9.0.0, < 9.6.0
• >= 9.0.0, < 9.6.0-alpha.24

CVSS scores

References (5)

• ADVISORYnvd.nist.gov/vuln/detail/CVE-2026-32886
• PATCHgithub.com/parse-community/parse-server
• WEBgithub.com/parse-community/parse-server/pull/10210
• WEBgithub.com/parse-community/parse-server/pull/10211