Parse Server's Cloud function dispatch crashes server via prototype chain traversal
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 software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| npm package | parse-server | >= 9.0.0, < 9.6.0-alpha.24, < 8.6.47 | 9.6.0-alpha.24, 8.6.47 |
References
- https://github.com/parse-community/parse-server/security/advisories/GHSA-4263-jgmp-7pf4
- https://nvd.nist.gov/vuln/detail/CVE-2026-32886
- https://github.com/parse-community/parse-server/pull/10210
- https://github.com/parse-community/parse-server/pull/10211
- https://github.com/parse-community/parse-server
- CVSS 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- Weakness (CWE)
CWE-1321- Platform
- npm
- Package
parse-server- Disclosed
- 17.03.2026
- Updated
- 11.10.2026 10:22
Sources and licenses
OSV / GitHub Advisory Database - GHSA-4263-jgmp-7pf4 - CC BY 4.0
Vulnerability history: parse-server
All published vulnerabilities of this package (npm package), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 116
- First → latest
- 06.2019 06.2026
- Without a fix
- 0
- Exploited in attacks
- 0
Severity breakdown
- Critical 17
- High 49
- Medium 40
- Low 10
Disclosures per year
- 2019: 2
- 2020: 4
- 2021: 4
- 2022: 12
- 2023: 5
- 2024: 4
- 2025: 6
- 2026: 79
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Parse Server's Cloud function dispatch crashes server via prototype chain traversal this entry
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