CVE-2026-32886
Parse Server's Cloud function dispatch crashes server via prototype chain traversal
EPSS 0.03%
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.
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 0.0%, 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
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 4.0 | — | 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 |