PT-2026-33270 · Line · Line

Published 2026-04-16 · Updated 2026-04-30 · CVE-2026-3861

Positive Technologies (AI Summary)

CVSS v4.0

7.1

High

Base vector

AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Name of the Vulnerable Software and Affected Versions LINE client for iOS versions prior to 26.3.0

Description An issue exists in the in-app browser where opening a specially crafted web page can repeatedly trigger OS-level dialogs. This behavior can lead to a denial of service, potentially causing the iOS device to become temporarily inoperable.

Recommendations Update to version 26.3.0 or later.

Fix

DoS

UI Misrepresentation of Critical Information

Weakness Enumeration

CWE-451

Related Identifiers

CVE-2026-3861

Affected Products

Line

References · 5

• https://nvd.nist.gov/vuln/detail/CVE-2026-3861 · Security Note
• https://hackerone.com/reports/3422905 · Note
• https://twitter.com/VulmonFeeds/status/2044735703683137657 · Twitter Post
• https://twitter.com/CVEnew/status/2044701561864233416 · Twitter Post
• https://t.me/cveNotify/161520 · Telegram Post