CVE-2026-3861

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.

CVSS v3 6.5 MEDIUM

6.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://hackerone.com/reports/3422905	Permissions Required

Configurations

Configuration 1 (hide)

cpe:2.3:a:linecorp:line:*:*:*:*:*:iphone_os:*:*

History

26 Oct 2026, 21:10

Type	Values Removed	Values Added
Summary		(es) El cliente LINE para versiones de iOS anteriores a la 26.3.0 contiene una vulnerabilidad en el navegador integrado en la aplicación donde la apertura de una página web manipulada puede activar repetidamente diálogos a nivel del sistema operativo debido a salvaguardias insuficientes al manejar esquemas de URL arbitrarios, lo que podría causar que el dispositivo iOS se vuelva temporalmente inoperable.

Information

Published : 2026-04-16 07:16

Updated : 2026-10-26 21:10

NVD link : CVE-2026-3861

Mitre link : CVE-2026-3861

CVE.ORG link : CVE-2026-3861

JSON object : View

Products Affected

linecorp

line

CWE

CWE-451

User Interface (UI) Misrepresentation of Critical Information

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