parse-community/parse-server · Security
Parse Server's Cloud function dispatch crashes server via prototype chain traversal
- GHSA ID
- GHSA-4263-jgmp-7pf4
- CVE ID
- CVE-2026-32886
- Severity
- high
- Published
- Updated
- CVSS v4
- 8.2 · 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
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.
CWEs
- CWE-1321 · Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')
References
- https://github.com/parse-community/parse-server/security/advisories/GHSA-4263-jgmp-7pf4 ↗
- https://github.com/parse-community/parse-server/pull/10210 ↗
- https://github.com/parse-community/parse-server/pull/10211 ↗
- https://nvd.nist.gov/vuln/detail/CVE-2026-32886 ↗
- https://github.com/advisories/GHSA-4263-jgmp-7pf4 ↗