Critical

Prototype Pollution in set-in

  • Disclosed: 18.03.2022
  • Updated: 11.10.2026 10:22

The package set-in before 2.0.3 is vulnerable to Prototype Pollution via the setIn method, as it allows an attacker to merge object prototypes into it. Note: This vulnerability derives from an incomplete fix of CVE-2020-28273

Affected software

Click a technology to see all vulnerabilities affecting it.

PlatformPackageVulnerable versionsFixed in
npm package set-in < 2.0.3 2.0.3

References

CVSS score 9.8/10
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE)
CWE-1321
Platform
npm
Package
set-in
Disclosed
18.03.2022
Updated
11.10.2026 10:22

Sources and licenses

OSV / GitHub Advisory Database - GHSA-6956-83fg-5wc5 - CC BY 4.0

Vulnerability history: set-in

All published vulnerabilities of this package (npm package), newest first. Shows whether this is a one-off slip or a package that needs watching.

Total entries
3
First → latest
03.2021 02.2026
Without a fix
0
Exploited in attacks
0

Severity breakdown

  • Critical 3

Disclosures per year

  1. 2021: 1
  2. 2022: 1
  3. 2023: 0
  4. 2024: 0
  5. 2025: 0
  6. 2026: 1
  1. Critical CVE-2026-26021 >= 2.0.1, < 2.0.5 2.0.5
  2. Prototype Pollution in set-in this entry
    Critical · 9.8 CVE-2022-25354 < 2.0.3 2.0.3
  3. Critical · 9.8 CVE-2020-28273 < 2.0.1 2.0.1

Know which vulnerabilities affect your application

With the DockRay integration and software inventory enabled, DockRay checks reported component versions against known vulnerabilities and notifies you about confirmed matches. Coverage depends on the supported technology and available advisory data.

Connect your application
DockRay newsletter

Application security in your inbox

Important vulnerabilities, actionable guidance and practical advice for your applications. Choose your technologies and follow what matters to your project.

  • A daily digest of new vulnerabilities, critical ones included.
  • Notifications about important updates.
  • Practical advice on application security and monitoring.

Leave empty to receive updates for every technology.

Free to subscribe. Unsubscribe with one click in any email.