CVE-2021-28860

Name: CVE-2021-28860
Creator: NVD / NIST
Published: 2021-05-03T12:15:07.467+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.1/10EPSS 1.96%

Last modified Jun 17, 2026

CVE-2021-28860 is a critical-severity vulnerability rated 9.1/10 on the CVSS scale. In Node.js mixme, prior to v0.5.1, an attacker can add or alter properties of an object via '__proto__' through the mutate() and merge() functions. The polluted attribute will be directly assigned to every object in the program. EPSS estimates a 1.96% chance of exploitation in the next 30 days.

Description

In Node.js mixme, prior to v0.5.1, an attacker can add or alter properties of an object via '__proto__' through the mutate() and merge() functions. The polluted attribute will be directly assigned to every object in the program. This will put the availability of the program at risk causing a potential denial of service (DoS).

Metrics

CVSS 3.1

9.1/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H

EPSS Probability

1.96%

77.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-1321

Affected Software

Vendor	Product	Versions
Adaltas	Mixme	< 0.5.1

References

http://nodejs.comThird Party Advisory, URL Repurposed
https://github.com/adaltas/node-mixme/commit/cfd5fbfc32368bcf7e06d1c5985ea60e34cd4028Patch, Third Party Advisory
https://github.com/adaltas/node-mixme/issues/1Issue Tracking, Third Party Advisory
https://github.com/adaltas/node-mixme/security/advisories/GHSA-79jw-6wg7-r9g4Patch, Third Party Advisory
https://security.netapp.com/advisory/ntap-20210618-0005/Third Party Advisory
https://www.npmjs.com/~davidThird Party Advisory
http://nodejs.comThird Party Advisory, URL Repurposed
https://github.com/adaltas/node-mixme/commit/cfd5fbfc32368bcf7e06d1c5985ea60e34cd4028Patch, Third Party Advisory
https://github.com/adaltas/node-mixme/issues/1Issue Tracking, Third Party Advisory
https://github.com/adaltas/node-mixme/security/advisories/GHSA-79jw-6wg7-r9g4Patch, Third Party Advisory
https://security.netapp.com/advisory/ntap-20210618-0005/Third Party Advisory
https://www.npmjs.com/~davidThird Party Advisory

Timeline

Published: May 3, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-28860?

How severe is CVE-2021-28860?

CVE-2021-28860 has a CVSS score of 9.1/10 (CRITICAL severity). The EPSS model estimates a 1.96% probability of exploitation in the next 30 days.

How do I fix CVE-2021-28860?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-28860?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST