Vulnerability-Lookup

JVNDB-2026-023598

Vulnerability from jvndb - Published: 2026-07-14 19:10 - Updated:2026-07-14 19:10

Summary

Denial-of-service (DoS) vulnerability in the in-app browser of LINE client for iOS

Details

LINE client for iOS provided by LY Corporation contains a vulnerability in the in-app browser due to insufficient safeguards when handling arbitrary URL schemes, which may lead to denial-of-service (DoS) condition (CWE-400, CVE-2026-3861). LY Corporation reported this vulnerability to JPCERT/CC to notify users of its solution through JVN.

References

Type

URL

	JVN	https://jvn.jp/en/vu/JVNVU94039788/index.html
	CVE	https://www.cve.org/CVERecord?id=CVE-2026-3861
	Uncontrolled Resource Consumption ('Resource Exhaustion')(CWE-400)	https://cwe.mitre.org/data/definitions/400.html

Impacted products

Vendor

Product

Show details on JVN DB website

JSON

To clipboard

{
  "@rdf:about": "https://jvndb.jvn.jp/en/contents/2026/JVNDB-2026-023598.html",
  "dc:date": "2026-07-14T19:10+09:00",
  "dcterms:issued": "2026-07-14T19:10+09:00",
  "dcterms:modified": "2026-07-14T19:10+09:00",
  "description": "LINE client for iOS provided by LY Corporation contains a vulnerability in the in-app browser due to insufficient safeguards when handling arbitrary URL schemes, which may lead to denial-of-service (DoS) condition (CWE-400, CVE-2026-3861).\r\n\r\nLY Corporation reported this vulnerability to JPCERT/CC to notify users of its solution through JVN.",
  "link": "https://jvndb.jvn.jp/en/contents/2026/JVNDB-2026-023598.html",
  "sec:identifier": "JVNDB-2026-023598",
  "sec:references": [
    {
      "#text": "https://jvn.jp/en/vu/JVNVU94039788/index.html",
      "@id": "JVNVU#94039788",
      "@source": "JVN"
    },
    {
      "#text": "https://www.cve.org/CVERecord?id=CVE-2026-3861",
      "@id": "CVE-2026-3861",
      "@source": "CVE"
    },
    {
      "#text": "https://cwe.mitre.org/data/definitions/400.html",
      "@id": "CWE-400",
      "@title": "Uncontrolled Resource Consumption (\u0027Resource Exhaustion\u0027)(CWE-400)"
    }
  ],
  "title": "Denial-of-service (DoS) vulnerability in the in-app browser of LINE client for iOS"
}

CVE-2026-3861 (GCVE-0-2026-3861)

Vulnerability from cvelistv5 – Published: 2026-04-16 05:54 – Updated: 2026-05-22 05:00

Summary

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.

Severity

6.5 (Medium)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-400
CWE-451 - User Interface (UI) Misrepresentation of Critical Information

Assigner

LY-Corporation

References

1 reference

URL	Tags
https://hackerone.com/reports/3422905

Impacted products

1 product

Vendor	Product	Version
LY Corporation	LINE client for iOS	Unaffected: 26.3.0 , < * (custom)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-3861",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-04-16T12:16:15.191045Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "problemTypes": [
          {
            "descriptions": [
              {
                "cweId": "CWE-451",
                "description": "CWE-451 User Interface (UI) Misrepresentation of Critical Information",
                "lang": "en",
                "type": "CWE"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-04-16T12:31:11.953Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "affected",
          "product": "LINE client for iOS",
          "vendor": "LY Corporation",
          "versions": [
            {
              "lessThan": "*",
              "status": "unaffected",
              "version": "26.3.0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "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."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 6.5,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
            "version": "3.1"
          },
          "cvssV4_0": {
            "baseScore": 7.1,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L",
            "version": "4.0"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "CWE-400",
              "lang": "en"
            }
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      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-22T05:00:53.312Z",
        "orgId": "657f3255-0560-4aed-82e4-7f579ec6acfb",
        "shortName": "LY-Corporation"
      },
      "references": [
        {
          "url": "https://hackerone.com/reports/3422905"
        }
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    }
  },
  "cveMetadata": {
    "assignerOrgId": "657f3255-0560-4aed-82e4-7f579ec6acfb",
    "assignerShortName": "LY-Corporation",
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    "datePublished": "2026-04-16T05:54:05.194Z",
    "dateReserved": "2026-03-10T05:02:39.735Z",
    "dateUpdated": "2026-05-22T05:00:53.312Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
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}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

JVNDB-2026-023598

CVE-2026-3861 (GCVE-0-2026-3861)

Tags

Sightings

Nomenclature