CVE-2026-32886: Parse Server Prototype Chain Traversal Vulnerability
Summary
CVE-2026-32886: Parse Server's Cloud function dispatch crashes server via prototype chain traversal. Affects parse-server across 2 version ranges.
< 8.6.47
>= 9.0.0, < 9.6.0-alpha.24
Fixed in 8.6.47 or 9.6.0-alpha.24, depending on the release line you run. How to fix ↓
Also tracked for
- parse · Bitnami
The same CVE-2026-32886 is tracked separately for each ecosystem and vendor. Its fix information is the same; the package and affected versions differ.
Check if this vulnerability affects your application
Upload a manifest or SBOM and we'll show whether you're affected, plus every other risky package in the same scan.
No signup required · Results in about 60 seconds
Background
Parse Server is an open-source backend framework that enables developers to build applications quickly and efficiently. It provides a robust set of features including cloud functions, real-time database capabilities, and user authentication. However, it is susceptible to vulnerabilities that can compromise the stability and security of applications built on it.
Vulnerability Detail
The vulnerability identified as CVE-2026-32886 allows remote clients to crash the Parse Server process by exploiting a flaw in the cloud function dispatch mechanism. By sending a crafted function name that traverses the JavaScript prototype chain of a registered cloud function handler, an attacker can induce a stack overflow, leading to server crashes. This vulnerability poses a significant risk as it can disrupt service availability and potentially expose sensitive data.
How To Fix
Latest published version: 9.10.5 as of 22 Oct 2026
npm install parse-server@9.10.5Upgrading to it may include breaking changes; the versions below are the minimum fixed release for this vulnerability.
If you can't move to the latest
The minimum fixed version depends on the release line you run.
-
< 8.6.478.6.47npm install parse-server@8.6.47 -
>= 9.0.0, < 9.6.0-alpha.249.6.0-alpha.24npm install parse-server@9.6.0-alpha.24
Tip — Not sure which release line you're on? Vulert can find the fix for the version you are using. Scan free →
Workaround
There is no known workaround for this vulnerability. The best course of action is to apply the available patches as soon as possible.
Conclusion
CVE-2026-32886 is a critical vulnerability in Parse Server that can lead to server crashes through prototype chain traversal. It is essential for developers using this framework to apply the necessary patches to safeguard their applications from potential disruptions and security risks.
See every vulnerability recorded for parse-server →
FAQ
CVE-2026-32886 is a vulnerability in Parse Server that allows remote clients to crash the server by exploiting a prototype chain traversal flaw.
You can check if your application is affected by using Vulert, which monitors and alerts for open-source vulnerabilities in real-time. Visit Vulert Scanner to use the Vulert playground.
The vulnerability can lead to server crashes, disrupting service availability and potentially exposing sensitive data to unauthorized access.
Yes, patches are available. Upgrade to Parse Server version 9.6.0-alpha.24 or 8.6.47 to mitigate the vulnerability.
While there is no known workaround, it is crucial to prioritize updating your Parse Server to the patched version as soon as possible to ensure the security and stability of your application.
References
Related vulnerabilities
Recent vulnerabilities recorded for parse-server.
