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CVE-2026-27212— Swiper has a Prototype Pollution Vulnerability

Quick assessment

Affected
nolimits4web swiper
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Swiper是Vladimir Kharlampidi个人开发者的一个免费移动触摸滑块。旨在用于移动网站、移动 Web 应用程序和移动原生应用程序。 Swiper 6.5.1版本至12.1.1版本存在安全漏洞，该漏洞源于存在原型污染，可能导致身份验证绕过、拒绝服务和远程代码执行。

AI Predicted 9.8 Difficulty: Easy EPSS 0.50% · P41
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I. Basic Information for CVE-2026-27212

Vulnerability Information
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Vulnerability Title
Swiper has a Prototype Pollution Vulnerability
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
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
Source: CVE Program / CVE List V5
Vulnerability Type
CWE-1321
Source: CVE Program / CVE List V5
Vulnerability Title
Swiper 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Swiper是Vladimir Kharlampidi个人开发者的一个免费移动触摸滑块。旨在用于移动网站、移动 Web 应用程序和移动原生应用程序。 Swiper 6.5.1版本至12.1.1版本存在安全漏洞，该漏洞源于存在原型污染，可能导致身份验证绕过、拒绝服务和远程代码执行。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
nolimits4web swiper >= 6.5.1, < 12.1.2 -

II. Public POCs for CVE-2026-27212

# POC Description Source Link Shenlong Link
AI-Generated POC Verified env Premium
Reproduced successfully in a real sandbox · Below is the actual recording of building the environment and exploiting the vulnerability.
Success marker: VULNERABLE: Object.prototype polluted - ({}).canary = PROOF_37738df0ad76c4ef - proof token exfiltrated through the exploit
Reproduction recording is a Pro+ exclusive
Watch the full sandbox build + live exploit recording for this CVE. Limited-time ¥499/mo.
Upgrade to Pro+
claude_code · 4746 chars
GitHub 复现环境（可 clone 直接跑）
Pro+ exclusive includes:
Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
In-depth vulnerability mechanism
Trigger conditions & impact
Full executable POC code
Exploit chain & mitigation
POC zip download
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III. Intelligence Information for CVE-2026-27212

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Vendor Advisories for CVE-2026-27212 (1)

IV. Related Vulnerabilities

Same product: swiper
Same weakness: CWE-1321

V. Comments for CVE-2026-27212

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