Vulnerability-Lookup

CVE-2026-41872 (GCVE-0-2026-41872)

Vulnerability from cvelistv5 – Published: 2026-05-12 05:21 – Updated: 2026-05-12 13:17

Summary

"Kura Sushi Official App" provided by EPG, Inc. is vulnerable to improper certificate validation. A man-in-the-middle attack may allow eavesdropping on, or altering, the communication on push notifications between the affected application and the relevant server.

Severity

7.4 (High)


                        
                          CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

9.1 (Critical)


                        
                          CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-05-12 13:17 UTC

CWE

CWE-295 - Improper certificate validation

Assigner

jpcert jpcert root

References

3 references

URL	Tags
https://play.google.com/store/apps/details?id=jp.…
https://apps.apple.com/jp/app/id942355925
https://jvn.jp/en/jp/JVN38632731/

Impacted products

2 products

Vendor	Product	Version	CPE status
EPG, Inc.	"Kura Sushi Official App" for Android	Affected: from 2.0.11 to 3.9.10	guessed
EPG, Inc.	"Kura Sushi Official App" for iOS	Affected: from 2.0.11 to 3.9.10	guessed

Show details on NVD website

JSON

To clipboard

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              "content": {
                "id": "CVE-2026-41872",
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                  },
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                    "Technical Impact": "total"
                  }
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                "role": "CISA Coordinator",
                "timestamp": "2026-05-12T13:17:31.269899Z",
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      "product_status:known_not_affected": "1",
      "source": "Red Hat CSAF VEX",
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    "vulnrichment": {
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FKIE_CVE-2026-41872

Vulnerability from fkie_nvd - Published: 2026-05-12 06:16 - Updated: 2026-06-17 10:47

Severity

7.4 (High) - CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

Summary

References

	URL	Tags
	vultures@jpcert.or.jp	https://apps.apple.com/jp/app/id942355925
	vultures@jpcert.or.jp	https://jvn.jp/en/jp/JVN38632731/
	vultures@jpcert.or.jp	https://play.google.com/store/apps/details?id=jp.co.kura_corpo&hl=ja

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "\"Kura Sushi Official App\" for Android",
          "vendor": "EPG, Inc.",
          "versions": [
            {
              "status": "affected",
              "version": "from 2.0.11 to 3.9.10"
            }
          ]
        },
        {
          "product": "\"Kura Sushi Official App\" for iOS",
          "vendor": "EPG, Inc.",
          "versions": [
            {
              "status": "affected",
              "version": "from 2.0.11 to 3.9.10"
            }
          ]
        }
      ],
      "source": "vultures@jpcert.or.jp"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "\"Kura Sushi Official App\" provided by EPG, Inc. is vulnerable to improper certificate validation. A man-in-the-middle attack may allow eavesdropping on, or altering, the communication on push notifications between the affected application and the relevant server."
    }
  ],
  "id": "CVE-2026-41872",
  "lastModified": "2026-06-17T10:47:08.033",
  "metrics": {
    "cvssMetricV30": [
      {
        "cvssData": {
          "attackComplexity": "HIGH",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 7.4,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N",
          "version": "3.0"
        },
        "exploitabilityScore": 2.2,
        "impactScore": 5.2,
        "source": "vultures@jpcert.or.jp",
        "type": "Secondary"
      }
    ],
    "cvssMetricV40": [
      {
        "cvssData": {
          "Automatable": "NOT_DEFINED",
          "Recovery": "NOT_DEFINED",
          "Safety": "NOT_DEFINED",
          "attackComplexity": "LOW",
          "attackRequirements": "PRESENT",
          "attackVector": "NETWORK",
          "availabilityRequirement": "NOT_DEFINED",
          "baseScore": 9.1,
          "baseSeverity": "CRITICAL",
          "confidentialityRequirement": "NOT_DEFINED",
          "exploitMaturity": "NOT_DEFINED",
          "integrityRequirement": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "privilegesRequired": "NONE",
          "providerUrgency": "NOT_DEFINED",
          "subAvailabilityImpact": "NONE",
          "subConfidentialityImpact": "NONE",
          "subIntegrityImpact": "NONE",
          "userInteraction": "NONE",
          "valueDensity": "NOT_DEFINED",
          "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/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",
          "version": "4.0",
          "vulnAvailabilityImpact": "NONE",
          "vulnConfidentialityImpact": "HIGH",
          "vulnIntegrityImpact": "HIGH",
          "vulnerabilityResponseEffort": "NOT_DEFINED"
        },
        "source": "vultures@jpcert.or.jp",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
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          "options": [
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  "references": [
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      "url": "https://apps.apple.com/jp/app/id942355925"
    },
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      "url": "https://jvn.jp/en/jp/JVN38632731/"
    },
    {
      "source": "vultures@jpcert.or.jp",
      "url": "https://play.google.com/store/apps/details?id=jp.co.kura_corpo\u0026hl=ja"
    }
  ],
  "sourceIdentifier": "vultures@jpcert.or.jp",
  "vulnStatus": "Deferred",
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          "lang": "en",
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}

GHSA-MCJH-PCFV-25RH

Vulnerability from github – Published: 2026-05-12 06:31 – Updated: 2026-05-12 06:31

Details

Severity

7.4 (High)


                  
                    CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

9.1 (Critical)


                  
                    CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-41872"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-295"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-05-12T06:16:09Z",
    "severity": "CRITICAL"
  },
  "details": "\"Kura Sushi Official App\" provided by EPG, Inc. is vulnerable to improper certificate validation. A man-in-the-middle attack may allow eavesdropping on, or altering, the communication on push notifications between the affected application and the relevant server.",
  "id": "GHSA-mcjh-pcfv-25rh",
  "modified": "2026-05-12T06:31:39Z",
  "published": "2026-05-12T06:31:39Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-41872"
    },
    {
      "type": "WEB",
      "url": "https://apps.apple.com/jp/app/id942355925"
    },
    {
      "type": "WEB",
      "url": "https://jvn.jp/en/jp/JVN38632731"
    },
    {
      "type": "WEB",
      "url": "https://play.google.com/store/apps/details?id=jp.co.kura_corpo\u0026hl=ja"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/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",
      "type": "CVSS_V4"
    }
  ]
}

JVNDB-2026-000067

Vulnerability from jvndb - Published: 2026-05-11 09:20 - Updated:2026-05-11 09:20

Severity

7.4 (High) - cvssV3_0 - CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

Summary

"Kura Sushi Official App" vulnerable to improper certificate validation

Details

"Kura Sushi Official App" provided by EPG, Inc. contains the following vulnerability.

Improper certificate validation on push notifications (CWE-295) - CVE-2026-41872

This analysis assumes a man-in-the-middle attack being conducted with a malicious wireless LAN access point

Tsuyoshi Ogawa of SAK University SIE Co., Ltd. reported this vulnerability to IPA.JPCERT/CC coordinated with the developer under Information Security Early Warning Partnership.

References

Type

URL

	JVN	https://jvn.jp/en/jp/JVN38632731/index.html
	CVE	https://www.cve.org/CVERecord?id=CVE-2026-41872
	No Mapping(CWE-Other)	https://www.ipa.go.jp/en/security/vulnerabilities/cwe.html

Impacted products

Vendor

Product

	EPG, Inc.	Kura Sushi Official App for Android
	EPG, Inc.	Kura Sushi Official App for iOS

Show details on JVN DB website

JSON

To clipboard

{
  "@rdf:about": "https://jvndb.jvn.jp/en/contents/2026/JVNDB-2026-000067.html",
  "dc:date": "2026-05-11T18:20+09:00",
  "dcterms:issued": "2026-05-11T18:20+09:00",
  "dcterms:modified": "2026-05-11T18:20+09:00",
  "description": "\"Kura Sushi Official App\" provided by EPG, Inc. contains the following vulnerability.\u003ca href=\u0027https://cwe.mitre.org/data/definitions/295.html\u0027 target=\u0027_blank\u0027\u003e\u003c/a\u003e\u003cul\u003e\u003cli\u003eImproper certificate validation on push notifications (CWE-295) - CVE-2026-41872\u003c/li\u003e\u003cul\u003e\u003cli\u003eThis analysis assumes a man-in-the-middle attack being conducted with a malicious wireless LAN access point\u003c/li\u003e\u003c/ul\u003e\u003c/ul\u003eTsuyoshi Ogawa of SAK University SIE Co., Ltd. reported this vulnerability to IPA.JPCERT/CC coordinated with the developer under Information Security Early Warning Partnership.",
  "link": "https://jvndb.jvn.jp/en/contents/2026/JVNDB-2026-000067.html",
  "sec:cpe": [
    {
      "#text": "cpe:/a:misc:epg_kura_sushi_official_app_for_android",
      "@product": "Kura Sushi Official App for Android",
      "@vendor": "EPG, Inc.",
      "@version": "2.2"
    },
    {
      "#text": "cpe:/a:misc:epg_kura_sushi_official_app_for_ios",
      "@product": "Kura Sushi Official App for iOS",
      "@vendor": "EPG, Inc.",
      "@version": "2.2"
    }
  ],
  "sec:cvss": {
    "@score": "7.4",
    "@severity": "High",
    "@type": "Base",
    "@vector": "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N",
    "@version": "3.0"
  },
  "sec:identifier": "JVNDB-2026-000067",
  "sec:references": [
    {
      "#text": "https://jvn.jp/en/jp/JVN38632731/index.html",
      "@id": "JVN#38632731",
      "@source": "JVN"
    },
    {
      "#text": "https://www.cve.org/CVERecord?id=CVE-2026-41872",
      "@id": "CVE-2026-41872",
      "@source": "CVE"
    },
    {
      "#text": "https://www.ipa.go.jp/en/security/vulnerabilities/cwe.html",
      "@id": "CWE-Other",
      "@title": "No Mapping(CWE-Other)"
    }
  ],
  "title": "\"Kura Sushi Official App\" vulnerable to improper certificate validation"
}

Sightings

Author	Source	Type	Date	Other

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Confirmed: The vulnerability has been validated from an analyst's perspective.
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Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
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Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

CVE-2026-41872 (GCVE-0-2026-41872)

FKIE_CVE-2026-41872

GHSA-MCJH-PCFV-25RH

JVNDB-2026-000067

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