CVE-2026-16266

MEDIUM6.3

Versions of the package mongo-object before 3.0.3 are vulnerable to Prototype Pollution via the expandKey() function in util.js

Published Jul 21, 2026

Modified 1 months ago

Details

Versions of the package mongo-object before 3.0.3 are vulnerable to Prototype Pollution via the expandKey() function in util.js. An attacker can modify the JavaScript prototype chain by supplying a crafted property path containing special keys such as proto.

References

WEB

https://github.com/longshotlabs/mongo-object/blob/4f7a570f2a2fcfa9417b7870d5f859e9574ec73c/src/util.ts%23L251

WEB

https://github.com/longshotlabs/mongo-object/commit/638314107d8b397e5453c28e41729522b3e8d67c

WEB

https://github.com/longshotlabs/mongo-object/issues/27

WEB

https://security.snyk.io/vuln/SNYK-JS-MONGOOBJECT-13816714

ADVISORY

https://www.cve.org/CVERecord?id=CVE-2026-16266

CVSS Analysis