GHSA-4263-jgmp-7pf4 — parse-server
Fix: parse-community/parse-server#10210GHSA-4263-jgmp-7pf4 is a remote code execution vulnerability in parse-server. A fix is available for parse-server — see the affected versions and patch details below.
Parse Server's Cloud function dispatch crashes server via prototype chain traversal
Exploitation Status
No confirmed exploitation observed yet
- CISA’s own triage has not observed active exploitation or public proof-of-concept code for this CVE as of its last assessment.
Exploitation and automatability from CISA’s SSVC triage for GHSA-4263-jgmp-7pf4.
EPSS Exploitation Probability
EPSS (Exploit Prediction Scoring System) is a daily probability model maintained by FIRST.org. It estimates the likelihood a CVE will be exploited in production environments within the next 30 days, derived from real-world threat intelligence signals.
Real-World Exposure
How broadly this vulnerability is actually deployed: weekly install volume shows current usage, and reverse-dependency count shows how many other packages break if it stays unpatched.
parse-servernpmDescription
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.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 📦npm | parse-server | ≥ 9.0.0&&< 9.6.0-alpha.24 | 9.6.0-alpha.24npm install parse-server@9.6.0-alpha.24 |
| 📦npm | parse-server | all versions | 8.6.47npm install parse-server@8.6.47 |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for parse-server, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update parse-server to 9.6.0-alpha.24 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-4263-jgmp-7pf4 is resolved across your whole dependency graph.
Workarounds
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.
How O3 protects you
O3 Security's impact-aware SCA analyses which vulnerable code paths your application actually calls, so a match like GHSA-4263-jgmp-7pf4 can be triaged on real exposure rather than presence alone.
Tailored to GHSA-4263-jgmp-7pf4. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.
Frequently Asked Questions
Is GHSA-4263-jgmp-7pf4 in your dependencies?
O3 Security finds GHSA-4263-jgmp-7pf4 across npm dependencies, including transitive ones, and its impact-aware SCA ranks findings by whether your code actually calls the vulnerable path.