High severity · published Mar 18, 2026
CVE-2026-32886
Parse Server's Cloud function dispatch crashes server via prototype chain traversal
7.5
CVSS
0.5%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 44% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
PA
parse-server · parse-community
>= 9.0.0, < 9.6.0-alpha.24; < 8.6.47 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-32886
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-32886
Issue Tracking
https://github.com/parse-community/parse-server/pull/10210
Issue Tracking
https://github.com/parse-community/parse-server/pull/10211
Vendor Advisory
https://github.com/parse-community/parse-server/security/advisories/GHSA-4263-jgmp-7pf4
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