{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-58649", "assignerOrgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8", "state": "PUBLISHED", "assignerShortName": "microsoft", "dateReserved": "2026-07-01T21:14:44.619Z", "datePublished": "2026-09-08T17:17:36.706Z", "dateUpdated": "2026-10-14T23:13:03.213Z"}, "containers": {"cna": {"title": ".NET Information Disclosure Vulnerability", "datePublic": "2026-09-08T14:00:00.000Z", "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:microsoft:visual_studio_2022:*:*:*:*:*:*:*:*", "versionStartIncluding": "17.14.0", "versionEndExcluding": "17.14.40"}, {"vulnerable": true, "criteria": "cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:*", "versionStartIncluding": "11.0.0", "versionEndExcluding": "11.0 RC1"}, {"vulnerable": true, "criteria": "cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:*", "versionStartIncluding": "8.0.0", "versionEndExcluding": "8.0.130, 8.0.424"}, {"vulnerable": true, "criteria": "cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:*", "versionStartIncluding": "9.0.0", "versionEndExcluding": "9.0.120, 9.0.317"}, {"vulnerable": true, "criteria": "cpe:2.3:a:microsoft:visual_studio_2026:*:*:*:*:*:*:*:*", "versionStartIncluding": "18.9.0", "versionEndExcluding": "18.9.3"}, {"vulnerable": true, "criteria": "cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:*", "versionStartIncluding": "10.0.0", "versionEndExcluding": "10.0.111, 10.0.400"}]}]}], "affected": [{"vendor": "Microsoft", "product": ".NET 10.0", "versions": [{"version": "10.0.0", "lessThan": "10.0.111, 10.0.400", "versionType": "custom", "status": "affected"}]}, {"vendor": "Microsoft", "product": ".NET 11.0", "versions": [{"version": "11.0.0", "lessThan": "11.0 RC1", "versionType": "custom", "status": "affected"}]}, {"vendor": "Microsoft", "product": ".NET 8.0", "versions": [{"version": "8.0.0", "lessThan": "8.0.130, 8.0.424", "versionType": "custom", "status": "affected"}]}, {"vendor": "Microsoft", "product": ".NET 9.0", "versions": [{"version": "9.0.0", "lessThan": "9.0.120, 9.0.317", "versionType": "custom", "status": "affected"}]}, {"vendor": "Microsoft", "product": "Microsoft Visual Studio 2022 version 17.14", "versions": [{"version": "17.14.0", "lessThan": "17.14.40", "versionType": "custom", "status": "affected"}]}, {"vendor": "Microsoft", "product": "Microsoft Visual Studio 2026 version 18.9", "versions": [{"version": "18.9.0", "lessThan": "18.9.3", "versionType": "custom", "status": "affected"}]}], "descriptions": [{"value": "Origin validation error in .NET allows an unauthorized attacker to disclose information over a network.", "lang": "en-US"}], "problemTypes": [{"descriptions": [{"description": "CWE-346: Origin Validation Error", "lang": "en-US", "type": "CWE", "cweId": "CWE-346"}]}], "providerMetadata": {"orgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8", "shortName": "microsoft", "dateUpdated": "2026-10-14T23:13:03.213Z"}, "references": [{"name": ".NET Information Disclosure Vulnerability", "tags": ["vendor-advisory", "patch"], "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-58649"}], "metrics": [{"format": "CVSS", "scenarios": [{"lang": "en-US", "value": "GENERAL"}], "cvssV3_1": {"version": "3.1", "baseSeverity": "MEDIUM", "baseScore": 6.5, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C"}}]}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-09-08T19:45:24.737506Z", "id": "CVE-2026-58649", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-09-08T20:06:52.403Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-58649", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-09-08T19:45:24.737506Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-09-08T20:06:46.344Z"}}], "cna": {"title": ".NET Information Disclosure Vulnerability", "metrics": [{"format": "CVSS", "cvssV3_1": {"version": "3.1", "baseScore": 6.5, "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C"}, "scenarios": [{"lang": "en-US", "value": "GENERAL"}]}], "affected": [{"vendor": "Microsoft", "product": ".NET 10.0", "versions": [{"status": "affected", "version": "10.0.0", "lessThan": "10.0.111, 10.0.400", "versionType": "custom"}]}, {"vendor": "Microsoft", "product": ".NET 11.0", "versions": [{"status": "affected", "version": "11.0.0", "lessThan": "11.0 RC1", "versionType": "custom"}]}, {"vendor": "Microsoft", "product": ".NET 8.0", "versions": [{"status": "affected", "version": "8.0.0", "lessThan": "8.0.130, 8.0.424", "versionType": "custom"}]}, {"vendor": "Microsoft", "product": ".NET 9.0", "versions": [{"status": "affected", "version": "9.0.0", "lessThan": "9.0.120, 9.0.317", "versionType": "custom"}]}, {"vendor": "Microsoft", "product": "Microsoft Visual Studio 2022 version 17.14", "versions": [{"status": "affected", "version": "17.14.0", "lessThan": "17.14.40", "versionType": "custom"}]}, {"vendor": "Microsoft", "product": "Microsoft Visual Studio 2026 version 18.9", "versions": [{"status": "affected", "version": "18.9.0", "lessThan": "18.9.3", "versionType": "custom"}]}], "datePublic": "2026-09-08T14:00:00.000Z", "references": [{"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-58649", "name": ".NET Information Disclosure Vulnerability", "tags": ["vendor-advisory", "patch"]}], "descriptions": [{"lang": "en-US", "value": "Origin validation error in .NET allows an unauthorized attacker to disclose information over a network."}], "problemTypes": [{"descriptions": [{"lang": "en-US", "type": "CWE", "cweId": "CWE-346", "description": "CWE-346: Origin Validation Error"}]}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:microsoft:visual_studio_2022:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "17.14.40", "versionStartIncluding": "17.14.0"}, {"criteria": "cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "11.0 RC1", "versionStartIncluding": "11.0.0"}, {"criteria": "cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "8.0.130, 8.0.424", "versionStartIncluding": "8.0.0"}, {"criteria": "cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "9.0.120, 9.0.317", "versionStartIncluding": "9.0.0"}, {"criteria": "cpe:2.3:a:microsoft:visual_studio_2026:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "18.9.3", "versionStartIncluding": "18.9.0"}, {"criteria": "cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "10.0.111, 10.0.400", "versionStartIncluding": "10.0.0"}], "operator": "OR"}]}], "providerMetadata": {"orgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8", "shortName": "microsoft", "dateUpdated": "2026-10-07T15:03:15.286Z"}}}, "cveMetadata": {"cveId": "CVE-2026-58649", "state": "PUBLISHED", "dateUpdated": "2026-10-07T15:03:15.286Z", "dateReserved": "2026-07-01T21:14:44.619Z", "assignerOrgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8", "datePublished": "2026-09-08T17:17:36.706Z", "assignerShortName": "microsoft"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"product": ".NET 10.0", "vendor": "Microsoft", "versions": [{"lessThan": "10.0.111, 10.0.400", "status": "affected", "version": "10.0.0", "versionType": "custom"}]}, {"product": ".NET 11.0", "vendor": "Microsoft", "versions": [{"lessThan": "11.0 RC1", "status": "affected", "version": "11.0.0", "versionType": "custom"}]}, {"product": ".NET 8.0", "vendor": "Microsoft", "versions": [{"lessThan": "8.0.130, 8.0.424", "status": "affected", "version": "8.0.0", "versionType": "custom"}]}, {"product": ".NET 9.0", "vendor": "Microsoft", "versions": [{"lessThan": "9.0.120, 9.0.317", "status": "affected", "version": "9.0.0", "versionType": "custom"}]}, {"product": "Microsoft Visual Studio 2022 version 17.14", "vendor": "Microsoft", "versions": [{"lessThan": "17.14.40", "status": "affected", "version": "17.14.0", "versionType": "custom"}]}, {"product": "Microsoft Visual Studio 2026 version 18.9", "vendor": "Microsoft", "versions": [{"lessThan": "18.9.3", "status": "affected", "version": "18.9.0", "versionType": "custom"}]}], "source": "secure@microsoft.com"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:microsoft:.net:11.0.0:preview1:*:*:*:*:*:*", "matchCriteriaId": "5DACF2FE-CF61-43E4-8A3F-F7A358DE8A01", "vulnerable": true}, {"criteria": "cpe:2.3:a:microsoft:.net:11.0.0:preview2:*:*:*:*:*:*", "matchCriteriaId": "280B2E64-3163-40AB-A048-14D58DEC42FD", "vulnerable": true}, {"criteria": "cpe:2.3:a:microsoft:.net:11.0.0:preview3:*:*:*:*:*:*", "matchCriteriaId": "12357908-3294-46EF-85A0-DA3F86C97489", "vulnerable": true}, {"criteria": "cpe:2.3:a:microsoft:.net:11.0.0:preview4:*:*:*:*:*:*", "matchCriteriaId": "849FC8F5-86CD-4B5D-ADFD-9CB16EA75D09", "vulnerable": true}, {"criteria": "cpe:2.3:a:microsoft:.net:11.0.0:preview5:*:*:*:*:*:*", "matchCriteriaId": "C86E87E2-B236-4AC9-B6C3-64B9CDEC91EB", "vulnerable": true}, {"criteria": "cpe:2.3:a:microsoft:.net:11.0.0:preview6:*:*:*:*:*:*", "matchCriteriaId": "9B14656E-2BB0-4B4B-B518-F3D5108253ED", "vulnerable": true}, {"criteria": "cpe:2.3:a:microsoft:.net:11.0.0:preview7:*:*:*:*:*:*", "matchCriteriaId": "E09C9DB3-F42C-4442-9CF0-24A780D094C8", "vulnerable": true}, {"criteria": "cpe:2.3:a:microsoft:.net_sdk:*:*:*:*:*:*:*:*", "matchCriteriaId": "CF859D90-AD39-48FD-BC10-95C60DD12385", "versionEndExcluding": "8.0.130", "versionStartIncluding": "8.0.100", "vulnerable": true}, {"criteria": "cpe:2.3:a:microsoft:.net_sdk:*:*:*:*:*:*:*:*", "matchCriteriaId": "D2EAEBB6-DF12-41DF-A0B4-CCCF7AA4FE53", "versionEndExcluding": "8.0.424", "versionStartIncluding": "8.0.200", "vulnerable": true}, {"criteria": "cpe:2.3:a:microsoft:.net_sdk:*:*:*:*:*:*:*:*", "matchCriteriaId": "57A6FE38-7904-4C39-ADAB-F3D6086A709F", "versionEndExcluding": "9.0.120", "versionStartIncluding": "9.0.100", "vulnerable": true}, {"criteria": "cpe:2.3:a:microsoft:.net_sdk:*:*:*:*:*:*:*:*", "matchCriteriaId": "8A1D49A2-10B6-4949-B5A2-F506DFEBC090", "versionEndExcluding": "9.0.317", "versionStartIncluding": "9.0.200", "vulnerable": true}, {"criteria": "cpe:2.3:a:microsoft:.net_sdk:*:*:*:*:*:*:*:*", "matchCriteriaId": "2B8BF908-8EF3-4CB9-83C2-617DB83177BB", "versionEndExcluding": "10.0.111", "versionStartIncluding": "10.0.100", "vulnerable": true}, {"criteria": "cpe:2.3:a:microsoft:.net_sdk:*:*:*:*:*:*:*:*", "matchCriteriaId": "44F269B4-1601-4BE6-81F2-44E3BF295470", "versionEndExcluding": "10.0.400", "versionStartIncluding": "10.0.200", "vulnerable": true}], "negate": false, "operator": "OR"}, {"cpeMatch": [{"criteria": "cpe:2.3:o:apple:macos:-:*:*:*:*:*:*:*", "matchCriteriaId": "387021A0-AF36-463C-A605-32EA7DAC172E", "vulnerable": false}, {"criteria": "cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*", "matchCriteriaId": "703AF700-7A70-47E2-BC3A-7FD03B3CA9C1", "vulnerable": false}, {"criteria": "cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:*", "matchCriteriaId": "A2572D17-1DE6-457B-99CC-64AFD54487EA", "vulnerable": false}], "negate": false, "operator": "OR"}], "operator": "AND"}, {"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:microsoft:visual_studio_2022:*:*:*:*:*:-:*:*", "matchCriteriaId": "8C6D8096-86B5-4614-BF3F-05B674F8E9CC", "versionEndExcluding": "17.14.40", "versionStartIncluding": "17.14.0", "vulnerable": true}, {"criteria": "cpe:2.3:a:microsoft:visual_studio_2026:*:*:*:*:*:*:*:*", "matchCriteriaId": "C66064BF-3349-43FF-8A22-9370663193DE", "versionEndExcluding": "18.9.3", "versionStartIncluding": "18.9.0", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Origin validation error in .NET allows an unauthorized attacker to disclose information over a network."}], "id": "CVE-2026-58649", "lastModified": "2026-10-07T15:05:42.297", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 6.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 3.6, "source": "secure@microsoft.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-58649", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-09-08T19:45:24.737506Z", "version": "2.0.3"}}]}, "published": "2026-09-08T18:17:44.380", "references": [{"source": "secure@microsoft.com", "tags": ["Patch", "Vendor Advisory"], "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-58649"}], "sourceIdentifier": "secure@microsoft.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-346"}], "source": "secure@microsoft.com", "type": "Secondary"}]}

{"bugzilla": {"description": "dotnet10.0: dotnet9.0: dotnet8.0: .NET Information Disclosure Vulnerability", "id": "2528870", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2528870"}, "csaw": false, "cvss3": {"cvss3_base_score": "6.5", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N", "status": "draft"}, "cwe": "CWE-346", "details": ["dotnet watch BrowserRefreshServer does not adequately validate cross-origin WebSocket origins, potentially allowing IL and PDB information disclosure."], "name": "CVE-2026-58649", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "package_name": "dotnet10.0", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "package_name": "dotnet8.0", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "package_name": "dotnet9.0", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "dotnet10.0", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "dotnet8.0", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "dotnet9.0", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "dotnet10.0", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "dotnet8.0", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "dotnet9.0", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/a:redhat:hummingbird:1", "fix_state": "Affected", "package_name": "dotnet10.0", "product_name": "Red Hat Hardened Images"}, {"cpe": "cpe:/a:redhat:hummingbird:1", "fix_state": "Affected", "package_name": "dotnet8.0", "product_name": "Red Hat Hardened Images"}, {"cpe": "cpe:/a:redhat:hummingbird:1", "fix_state": "Affected", "package_name": "dotnet9.0", "product_name": "Red Hat Hardened Images"}], "public_date": "2026-09-08T17:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-58649\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-58649\nhttps://github.com/dotnet/dotnet/commit/882ef164b92836bf0cabcf8eb8719274e9dc075e\nhttps://github.com/dotnet/dotnet/commit/ae39133877be792de27db50aaf415b5e9f003e11\nhttps://github.com/dotnet/sdk/commit/71ec9905155a8271ee90d42c20aaa54b9425f4ae\nhttps://github.com/dotnet/sdk/commit/97124d73362451fe8c40ab5dbaab3396908029cb\nhttps://github.com/dotnet/sdk/commit/d78666eeb83defc38c76bdf36f57a9a37b8e6e2a\nhttps://github.com/dotnet/sdk/commit/de67b096e71fd0df5ebe2cfd517270651f9f8ef6"], "threat_severity": "Moderate"}