GitHub Advisoryadvisory · npm
GHSA-4263-jgmp-7pf4 Parse Server's Cloud function dispatch crashes server via prototype chain traversal
HIGH
Official page ↗
- Aliases
- CVE-2026-32886
- Ecosystem
- npm
- Packages
- parse-server
- Severity
- High
- CVSS vector
- CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
- Weaknesses
- CWE-1321
- Reviewed
- 2026-03-17
Affected packages
• npm parse-server: >= 9.0.0, < 9.6.0-alpha.24 → fixed in 9.6.0-alpha.24
• npm parse-server: < 8.6.47 → fixed in 8.6.47
Description
Impact
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.
Patches
The fix restricts property lookups during cloud function name resolution to own properties only, preventing prototype chain traversal from stored function handlers.
Workarounds
There is no known workaround.
Related
Alias · CVE (1)
- CVE-2026-32886 Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. vulnerability
Weakness · CWE (1)
- CWE-1321 Improperly Controlled Modification of Object Prototype Attributes weakness
References
- https://github.com/parse-community/parse-server/security/advisories/GHSA-4263-jgmp-7pf4 web
- https://nvd.nist.gov/vuln/detail/CVE-2026-32886 advisory
- https://github.com/parse-community/parse-server/pull/10210 web
- https://github.com/parse-community/parse-server/pull/10211 web
- https://github.com/parse-community/parse-server package