Descriptions

LINE client for iOS versions prior to 26.3.0 contains a vulnerability in the in-app browser where opening a crafted web page can repeatedly trigger OS-level dialogs due to insufficient safeguards when handling arbitrary URL schemes, potentially causing the iOS device to become temporarily inoperable.

Severity

  • CVSSv3.1 Score: 6.5 (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H)
  • CVSSv4.0 Score: 7.1 (CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L)

Affected Versions

  • LINE client for iOS before 26.3.0

Fix

  • LINE should be updated to latest version.

Reference

  • https://www.cve.org/CVERecord?id=CVE-2026-3861

Updated: