Swiper has a Prototype Pollution Vulnerability_CVE-2026-27212

9.4 / 10

CRITICAL

CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H

Description

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.

AI Analysis

Prototype pollution vulnerability in Swiper, allowing for potential authentication bypass, denial of service, and remote code execution

Basic Information

ID CVE-2026-27212

Source GitHub_M

Published Feb 21, 2026 at 05:43

Affected Product

Vendor nolimits4web

Product swiper

Version >= 6.5.1, < 12.1.2

Affected Versions nolimits4web swiper >= 6.5.1, < 12.1.2

CWE Classification

CWE-1321

AI Assessment

AI Score 9.4 / 10

AI Severity Critical

Vendor nolimits4web

Product Swiper

Version 6.5.1-12.1.1

References

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    "published": "2026-02-21T05:43:07.072Z",
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