CVE-2026-16266
- State
- Published
- Severity
- 6.3 Medium
- Published
- Jul 21, 2026
- Updated
- Jul 21, 2026
- Reserved
- Jul 20, 2026
Description
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__.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 6.3 Medium | CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:L/SA:N | snyk |
| 3.1 | 4.0 Medium | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:N | snyk |
Weaknesses
- CWE-1321 Prototype Pollution
Affected Products
| Product | Versions |
|---|---|
mongo-objectn/a |
|
References
- https://security.snyk.io/vuln/SNYK-JS-MONGOOBJECT-13816714
- https://github.com/longshotlabs/mongo-object/issues/27
- https://github.com/longshotlabs/mongo-object/blob/4f7a570f2a2fcfa9417b7870d5f859e9574ec73c/src/util.ts%23L251
- https://github.com/longshotlabs/mongo-object/commit/638314107d8b397e5453c28e41729522b3e8d67c
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