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CVE-2026-3861

Quick assessment

Affected
LY Corporation LINE client for iOS
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Line Corporation Line Client For Ios是日本Line Corporation公司的一个通讯应用程序。 Line Corporation Line Client For Ios 26.3.0之前版本存在安全漏洞，该漏洞源于应用内浏览器问题，可能导致设备暂时无法操作。

CVSS 6.5 · Medium EPSS 0.34% · P26

Affected Version Matrix 1

VendorProduct Version RangeStatus
LY Corporation LINE client for iOS 26.3.0< * unaffected
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I. Basic Information for CVE-2026-3861

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Line Corporation Line Client For Ios 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Line Corporation Line Client For Ios是日本Line Corporation公司的一个通讯应用程序。 Line Corporation Line Client For Ios 26.3.0之前版本存在安全漏洞，该漏洞源于应用内浏览器问题，可能导致设备暂时无法操作。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
LY Corporation LINE client for iOS 26.3.0 ~ * -

II. Public POCs for CVE-2026-3861

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III. Intelligence Information for CVE-2026-3861

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IV. Related Vulnerabilities

Same product: LINE client for iOS
Same vendor: LY Corporation

V. Comments for CVE-2026-3861

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