CVE-2021-26707
Prototype pollution in Merge-deep
9.8
CRITICAL
CVSS 3.1
EPSS 1.1%
Description
The merge-deep library before 3.0.3 for Node.js can be tricked into overwriting properties of Object.prototype or adding new properties to it. These properties are then inherited by every object in the program, thus facilitating prototype-pollution attacks against applications using this library.
How to fix CVE-2021-26707
To remediate CVE-2021-26707, upgrade the affected package to a fixed version below.
- —upgrade to 3.0.3 or later
Is CVE-2021-26707 being exploited?
Low — EPSS is 1.1%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- from 0, < 3.0.3
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | CRITICAL9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |