{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-116081", "assignerOrgId": "ede6fdc4-6654-4307-a26d-3331c018e2ce", "state": "PUBLISHED", "assignerShortName": "jpcert", "dateReserved": "2026-11-10T08:07:47.836Z", "datePublished": "2026-11-11T05:19:16.842Z", "dateUpdated": "2026-11-11T05:19:16.842Z"}, "containers": {"cna": {"affected": [{"vendor": "Fenrir Inc.", "product": "Sleipnir Mobile for iPhone / iPad", "defaultStatus": "unaffected", "versions": [{"version": "0", "status": "affected", "versionType": "semver", "lessThanOrEqual": "v4.15.1"}]}, {"vendor": "Fenrir Inc.", "product": "Sleipnir Mobile for iPhone / iPad Black Edition", "defaultStatus": "unaffected", "versions": [{"version": "0", "status": "affected", "versionType": "semver", "lessThanOrEqual": "v4.15.1"}]}], "descriptions": [{"lang": "en", "value": "Sleipnir Mobile for iPhone / iPad and Sleipnir Mobile for iPhone / iPad Black Edition provided by Fenrir Inc. are vulnerable to improper certificate verification. A man-in-the-middle attack may allow an attacker to eavesdrop on an encrypted communication."}], "problemTypes": [{"descriptions": [{"description": "Improper certificate validation", "lang": "en-US", "cweId": "CWE-295", "type": "CWE"}]}], "references": [{"url": "https://apps.apple.com/us/app/sleipnir-mobile/id404732112"}, {"url": "https://apps.apple.com/jp/app/sleipnir-mobile-black-edition/id461181338"}, {"url": "https://jvn.jp/en/vu/JVNVU93068550/"}], "metrics": [{"format": "CVSS", "scenarios": [{"lang": "en-US", "value": "GENERAL"}], "cvssV3_1": {"version": "3.1", "baseSeverity": "MEDIUM", "baseScore": 4.2, "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N"}}, {"format": "CVSS", "scenarios": [{"lang": "en-US", "value": "GENERAL"}], "cvssV4_0": {"version": "4.0", "baseSeverity": "LOW", "baseScore": 2.3, "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N"}}], "providerMetadata": {"orgId": "ede6fdc4-6654-4307-a26d-3331c018e2ce", "shortName": "jpcert", "dateUpdated": "2026-11-11T05:19:16.842Z"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Sleipnir Mobile for iPhone / iPad", "vendor": "Fenrir Inc.", "versions": [{"lessThanOrEqual": "v4.15.1", "status": "affected", "version": "0", "versionType": "semver"}]}, {"defaultStatus": "unaffected", "product": "Sleipnir Mobile for iPhone / iPad Black Edition", "vendor": "Fenrir Inc.", "versions": [{"lessThanOrEqual": "v4.15.1", "status": "affected", "version": "0", "versionType": "semver"}]}], "source": "vultures@jpcert.or.jp"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Sleipnir Mobile for iPhone / iPad and Sleipnir Mobile for iPhone / iPad Black Edition provided by Fenrir Inc. are vulnerable to improper certificate verification. A man-in-the-middle attack may allow an attacker to eavesdrop on an encrypted communication."}], "id": "CVE-2026-116081", "lastModified": "2026-11-12T19:05:35.013", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 4.2, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 1.6, "impactScore": 2.5, "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": 2.3, "baseSeverity": "LOW", "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": "PASSIVE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:L/VI:L/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": "LOW", "vulnIntegrityImpact": "LOW", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "vultures@jpcert.or.jp", "type": "Secondary"}]}, "published": "2026-11-11T06:17:14.030", "references": [{"source": "vultures@jpcert.or.jp", "url": "https://apps.apple.com/jp/app/sleipnir-mobile-black-edition/id461181338"}, {"source": "vultures@jpcert.or.jp", "url": "https://apps.apple.com/us/app/sleipnir-mobile/id404732112"}, {"source": "vultures@jpcert.or.jp", "url": "https://jvn.jp/en/vu/JVNVU93068550/"}], "sourceIdentifier": "vultures@jpcert.or.jp", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-295"}], "source": "vultures@jpcert.or.jp", "type": "Primary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,4.15.1]"}}], "enrichment": {"confidence": 100.0, "confidence_source": "manual", "scores": [{"score": 100.0, "source": "manual"}]}, "original": {"product": "Sleipnir Mobile for iPhone / iPad", "source": "cna", "vendor": "Fenrir Inc."}, "product": "sleipnir_mobile_for_iphone_ipad", "vendor": "fenrir"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,4.15.1]"}}], "enrichment": {"confidence": 100.0, "confidence_source": "manual", "scores": [{"score": 100.0, "source": "manual"}]}, "original": {"product": "Sleipnir Mobile for iPhone / iPad Black Edition", "source": "cna", "vendor": "Fenrir Inc."}, "product": "sleipnir_mobile_for_iphone_ipad_black_edition", "vendor": "fenrir"}], "created": "2026-11-11T19:30:09.412512+00:00", "title": "Improper Certificate Validation Enables Man\u2011in\u2011the\u2011Middle Attack in Sleipnir Mobile", "updated": "2026-11-13T06:00:08.967301+00:00", "vendors": ["fenrir", "fenrir$PRODUCT$sleipnir_mobile_for_iphone_ipad", "fenrir$PRODUCT$sleipnir_mobile_for_iphone_ipad_black_edition"]}