CVE-2021-26505
MrSwitch hello.js vulnerable to prototype pollution
9.8
CRITICAL
CVSS 3.1
EPSS 0.95%
Description
A prototype pollution vulnerability in MrSwitch hello.js prior to version 1.18.8 allows remote attackers to execute arbitrary code via `hello.utils.extend` function.
How to fix CVE-2021-26505
To remediate CVE-2021-26505, upgrade the affected package to a fixed version below.
- npm/hellojs—upgrade to 1.18.8 or later
Is CVE-2021-26505 being exploited?
Low — EPSS is 1.0%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- from 0, < 1.18.8
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 |