Cross-site Scripting Vulnerability in Spin.js Package by Snyk
CVE-2026-3884

5.1MEDIUM

Key Information:

Vendor

Snyk

Status
Spin.js
Vendor
CVE Published:
11 March 2026

What is CVE-2026-3884?

Spin.js prior to version 3.0.0 contains a vulnerability that exposes applications to Cross-site Scripting (XSS) attacks. Malicious actors can exploit this flaw through the spin() function by introducing an arbitrary key-value pair into Object.prototype via a specially crafted URL. This prototype pollution facilitates the execution of unauthorized JavaScript in the user's browser, leading to potential security breaches.

Affected Version(s)

spin.js 0 < 3.0.0

References

https://security.snyk.io/vuln/SNYK-JS-SPINJS-15445079
https://gist.github.com/ericcornelissen/1a73e28fa50c3009b...

CVSS V4

Score:
5.1
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
Unknown

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Eric Cornelissen
Samuel Kajava
.