CVE-2026-3884

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.

Database specific

{
    "unresolved_ranges": [
        {
            "source": "AFFECTED_FIELD",
            "extracted_events": [
                {
                    "fixed": "3.0.0"
                }
            ]
        },
        {
            "source": "DESCRIPTION",
            "extracted_events": [
                {
                    "introduced": "spin.js"
                },
                {
                    "fixed": "3.0.0"
                },
                {
                    "introduced": "Object.prototype"
                }
            ]
        }
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/3xxx/CVE-2026-3884.json",
    "cna_assigner": "snyk",
    "cwe_ids": [
        "CWE-79"
    ]
}

References

Affected packages

Git / github.com/fgnass/spin.js

Affected ranges

Type

GIT

Repo

https://github.com/fgnass/spin.js

Events

Introduced

Fixed

64efdb147936eabf3f8debf621fe648edcdd7789

Database specific

{
    "source": "CPE_RANGE",
    "cpe": "cpe:2.3:a:spin.js:spin.js:*:*:*:*:*:node.js:*:*",
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "3.0.0"
        }
    ]
}

Affected versions

1.*

1.2.2

1.2.3

1.2.4

1.2.5

1.2.6

1.2.7

1.3.0

1.3.1

1.3.2

1.3.3

2.*

2.0.0

2.0.1

2.0.2

2.1.0

2.1.2

2.3.1

2.3.2

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-3884.json"