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, potentially causing the iOS device to become temporarily inoperable.

Metrics

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction Required

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Key SSVC decision points have not yet been added.

Affected Vendors & Products

Vendors Products
Line Corporation
  • Line Client For Ios

No data.

No data.

References
Link Providers
https://hackerone.com/reports/3422905 cve-icon cve-icon
History

Thu, 16 Apr 2026 09:30:00 +0000

Type Values Removed Values Added
First Time appeared Line Corporation
Line Corporation line Client For Ios
Vendors & Products Line Corporation
Line Corporation line Client For Ios

Thu, 16 Apr 2026 09:15:00 +0000

Type Values Removed Values Added
Title iOS Device Denial of Service via Repeated OS Dialogs in LINE In‑App Browser
Weaknesses CWE-835

Thu, 16 Apr 2026 06:30:00 +0000

Type Values Removed Values Added
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, potentially causing the iOS device to become temporarily inoperable.
References
Metrics cvssV3_1

{'score': 6.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H'}
cve-icon MITRE

Status: PUBLISHED

Assigner: LY-Corporation

Published: 2026-04-16T05:54:05.194Z

Updated: 2026-04-16T12:31:11.953Z

Reserved: 2026-03-10T05:02:39.735Z

Link: CVE-2026-3861

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-04-16T07:16:30.090

Modified: 2026-04-16T07:16:30.090

Link: CVE-2026-3861

cve-icon Redhat

No data.