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CVE-2026-27212GHSA-HMX5-QPQ5-P643

Swiper has a Prototype Pollution Vulnerability

Published
Last modified
published
Not listed in CISA KEV
Fix
Fixed in 12.1.2
1 proof of concept on GitHub
  • Exploitation: poc
  • Automatable: no
  • Technical impact: total

Summary

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.

Timeline

  1. CVE published
  2. CISA SSVC assessment

    Exploitation: poc · Automatable: no · Technical impact: total

  3. Record last updated

Affected versions

  • nolimits4web swiper

    From 6.5.1 · fixed in 12.1.2

  • swipernpm

    From 6.5.1 · fixed in 12.1.2

References 4

GitHub · nolimits4web/swiper

GitHub · stealth-factory/resize-image-before-upload-secure