CVE-2026-3861

MEDIUM

LINE client for iOS < 26.3.0 - Denial of Service via In-App Browser URL Scheme Handling

Title source: llm

Description

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.

References (1)

Core 1

Core References

https://hackerone.com/reports/3422905

Scores

CVSS v3 6.5

EPSS 0.0031

EPSS Percentile 21.9%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact partial

Details

CWE

CWE-451

Status published

Products (2)

LINE Corporation/LINE client for iOS - - 26.3.0

LY Corporation/LINE client for iOS 26.3.0

Published Apr 16, 2026

Tracked Since Apr 16, 2026