CVE-2026-27212

Swiper is a free and mobile touch slider with hardware accelerated transitions and native behavior. Versions 6.5.1 through 12.1.1 have a Prototype pollution vulnerability. The vulnerability resides in line 94 of shared/utils.mjs, where the indexOf() function is used to check whether user provided input contain forbidden strings. Despite a previous fix that attempted to mitigate prototype pollution by checking whether user input contained a forbidden key, it is still possible to pollute Object.prototype via a crafted input using Array.prototype. The exploit works across Windows and Linux and on Node and Bun runtimes. Any application that processes attacker-controlled input using this package may be affected by the following: Authentication Bypass, Denial of Service and RCE. This issue is fixed in version 12.1.2.

CVSS v3 7.8 HIGH

7.8^/10

CVSS v3 : HIGH

Vector :

Exploitability : 1.8 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/nolimits4web/swiper/commit/d3e663322a13043ca63aaba235d8cf3900e0c8cf	Patch
https://github.com/nolimits4web/swiper/releases/tag/v12.1.2	Product
https://github.com/nolimits4web/swiper/security/advisories/GHSA-hmx5-qpq5-p643	Exploit Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:swiperjs:swiper:*:*:*:*:*:node.js:*:*

History

No history.

Information

Published : 2026-02-21 06:17

Updated : 2026-02-24 15:16

NVD link : CVE-2026-27212

Mitre link : CVE-2026-27212

CVE.ORG link : CVE-2026-27212

JSON object : View

Products Affected

swiperjs

swiper

CWE

CWE-1321

Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')

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Versions 6.5.1 through 12.1.1 have a Prototype pollution vulnerability. The vulnerability resides in line 94 of shared/utils.mjs, where the indexOf() function is used to check whether user provided input contain forbidden strings. Despite a previous fix that attempted to mitigate prototype pollution by checking whether user input contained a forbidden key, it is still possible to pollute Object.prototype via a crafted input using Array.prototype. The exploit works across Windows and Linux and on Node and Bun runtimes. Any application that processes attacker-controlled input using this package may be affected by the following: Authentication Bypass, Denial of Service and RCE. This issue is fixed in version 12.1.2."}, {"lang": "es", "value": "Swiper es un deslizador t\u00e1ctil m\u00f3vil y gratuito con transiciones aceleradas por hardware y comportamiento nativo. Las versiones 6.5.1 hasta 12.1.1 tienen una vulnerabilidad de contaminaci\u00f3n de prototipos. La vulnerabilidad reside en la l\u00ednea 94 de shared/utils.mjs, donde la funci\u00f3n indexOf() se utiliza para verificar si la entrada proporcionada por el usuario contiene cadenas prohibidas. A pesar de una correcci\u00f3n anterior que intent\u00f3 mitigar la contaminaci\u00f3n de prototipos verificando si la entrada del usuario conten\u00eda una clave prohibida, todav\u00eda es posible contaminar Object.prototype a trav\u00e9s de una entrada manipulada usando Array.prototype. El exploit funciona en Windows y Linux y en los entornos de ejecuci\u00f3n de Node y Bun. Cualquier aplicaci\u00f3n que procese entrada controlada por el atacante usando este paquete puede verse afectada por lo siguiente: Omisi\u00f3n de Autenticaci\u00f3n, Denegaci\u00f3n de Servicio y RCE. 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