CVE-2026-3884

MEDIUM 6.1

CVSS Score

6.1

EPSS Score

0.0%

EPSS Percentile

0th

Versions of the package spin.js before 3.0.0 are vulnerable to Cross-site Scripting (XSS) via the spin() function that allows a creation of more than 1 alert for each 'target' element. An attacker would need to set an arbitrary key-value pair on Object.prototype through a crafted URL achieving a prototype pollution first, before being able to execute arbitrary JavaScript in the context of the user's browser.

CWE	CWE-79
Vendor	n/a
Product	spin.js
Published	Mar 11, 2026
Last Updated	Mar 11, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N/E:P

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

None

Affected Versions

n/a / spin.js

0 < 3.0.0

References

NVD ↗ CVE.org ↗ EPSS Data ↗

security.snyk.io: https://security.snyk.io/vuln/SNYK-JS-SPINJS-15445079 gist.github.com: https://gist.github.com/ericcornelissen/1a73e28fa50c3009b0eb51ad2fc19f25

Credits

Eric Cornelissen Samuel Kajava