CVE-2026-32886
highpriority · track · 30EPSS 0.005 · 44 %ileEUUSEPSS · scored 2026-10-27
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
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 4.6–8.2
ssvc
A stakeholder decision — act, attend, or track — from exploitation and impact.
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (9)
Products and version ranges known to be affected.
advisories (2)
Vendor and ecosystem advisories describing this.
- GHSA-4263-jgmp-7pf4Parse Server's Cloud function dispatch crashes server via prototype chain traversal2026-03-17ghsa · osvUS
### 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.
- BIT-parse-2026-32886Parse Server's Cloud function dispatch crashes server via prototype chain traversal2026-03-20vendor · osvUS
Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to 9.6.0 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 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.
also known as (5)
Other names and identifiers for this entity.
sources
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references (10)
External citations — patches, advisories, analysis.
- https://github.com/parse-community/parse-server/pull/10210cnnvd
- https://github.com/parse-community/parse-server/pull/10211cnnvd
- https://github.com/parse-community/parse-server/releasesPatchcnnvd
- https://github.com/parse-community/parse-server/security/advisories/GHSA-4263-jgmp-7pf4cnnvd
- https://github.com/parse-community/parse-server/pull/10210enisa_euvd
- https://github.com/parse-community/parse-server/pull/10211enisa_euvd
- https://github.com/parse-community/parse-server/security/advisories/GHSA-4263-jgmp-7pf4enisa_euvd
- https://github.com/parse-community/parse-server/pull/10210Issue Trackingnvd
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