CVE-2026-44503

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-44503", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-05-06T18:28:20.886Z", "datePublished": "2026-05-14T15:58:57.772Z", "dateUpdated": "2026-05-14T19:51:10.682Z"}, "containers": {"cna": {"title": "Kiota abstractions RedirectHandler leaks Cookie/Proxy-Authorization headers on cross-host redirect", "problemTypes": [{"descriptions": [{"cweId": "CWE-601", "lang": "en", "description": "CWE-601: URL Redirection to Untrusted Site ('Open Redirect')", "type": "CWE"}]}], "metrics": [{"cvssV4_0": {"attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "privilegesRequired": "NONE", "userInteraction": "PASSIVE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "NONE", "vulnAvailabilityImpact": "NONE", "subConfidentialityImpact": "HIGH", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "baseScore": 7, "baseSeverity": "HIGH", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N", "version": "4.0"}}], "references": [{"name": "https://github.com/microsoft/kiota-java/security/advisories/GHSA-7j59-v9qr-6fq9", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/microsoft/kiota-java/security/advisories/GHSA-7j59-v9qr-6fq9"}], "affected": [{"vendor": "microsoft", "product": "kiota-java", "versions": [{"version": "< 1.9.1", "status": "affected"}]}, {"vendor": "microsoft", "product": "Microsoft.Kiota.Abstractions", "versions": [{"version": "< 1.22.0", "status": "affected"}]}, {"vendor": "microsoft", "product": "github.com/microsoft/kiota-http-go", "versions": [{"version": "< 1.5.5", "status": "affected"}]}, {"vendor": "microsoft", "product": "kiota-typescript", "versions": [{"version": "< 1.0.0-preview.100", "status": "affected"}]}, {"vendor": "microsoft", "product": "microsoft-kiota-abstractions", "versions": [{"version": "< 1.9.1", "status": "affected"}]}, {"vendor": "microsoft", "product": "microsoft-kiota-http", "versions": [{"version": "< 1.9.9", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-05-14T15:58:57.772Z"}, "descriptions": [{"lang": "en", "value": "The RedirectHandler middleware in microsoft/kiota-java (com.microsoft.kiota:microsoft-kiota-http-okHttp v1.9.0) and other Kiota libraries fails to strip sensitive HTTP headers when following 3xx redirects to a different host or scheme. Only the Authorization header is removed; Cookie, Proxy-Authorization, and all custom headers are forwarded to the redirect target."}], "source": {"advisory": "GHSA-7j59-v9qr-6fq9", "discovery": "UNKNOWN"}}, "adp": [{"references": [{"url": "https://github.com/microsoft/kiota-java/security/advisories/GHSA-7j59-v9qr-6fq9", "tags": ["exploit"]}], "metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-05-14T18:02:08.790490Z", "id": "CVE-2026-44503", "options": [{"Exploitation": "poc"}, {"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": "2026-05-14T19:51:10.682Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-44503", "role": "CISA Coordinator", "options": [{"Exploitation": "poc"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-05-14T18:02:08.790490Z"}}}], "references": [{"url": "https://github.com/microsoft/kiota-java/security/advisories/GHSA-7j59-v9qr-6fq9", "tags": ["exploit"]}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-05-14T18:02:18.424Z"}}], "cna": {"title": "Kiota abstractions RedirectHandler leaks Cookie/Proxy-Authorization headers on cross-host redirect", "source": {"advisory": "GHSA-7j59-v9qr-6fq9", "discovery": "UNKNOWN"}, "metrics": [{"cvssV4_0": {"version": "4.0", "baseScore": 7, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N", "userInteraction": "PASSIVE", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "privilegesRequired": "NONE", "subIntegrityImpact": "NONE", "vulnIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "vulnAvailabilityImpact": "NONE", "subConfidentialityImpact": "HIGH", "vulnConfidentialityImpact": "HIGH"}}], "affected": [{"vendor": "microsoft", "product": "kiota-java", "versions": [{"status": "affected", "version": "< 1.9.1"}]}, {"vendor": "microsoft", "product": "Microsoft.Kiota.Abstractions", "versions": [{"status": "affected", "version": "< 1.22.0"}]}, {"vendor": "microsoft", "product": "github.com/microsoft/kiota-http-go", "versions": [{"status": "affected", "version": "< 1.5.5"}]}, {"vendor": "microsoft", "product": "kiota-typescript", "versions": [{"status": "affected", "version": "< 1.0.0-preview.100"}]}, {"vendor": "microsoft", "product": "microsoft-kiota-abstractions", "versions": [{"status": "affected", "version": "< 1.9.1"}]}, {"vendor": "microsoft", "product": "microsoft-kiota-http", "versions": [{"status": "affected", "version": "< 1.9.9"}]}], "references": [{"url": "https://github.com/microsoft/kiota-java/security/advisories/GHSA-7j59-v9qr-6fq9", "name": "https://github.com/microsoft/kiota-java/security/advisories/GHSA-7j59-v9qr-6fq9", "tags": ["x_refsource_CONFIRM"]}], "descriptions": [{"lang": "en", "value": "The RedirectHandler middleware in microsoft/kiota-java (com.microsoft.kiota:microsoft-kiota-http-okHttp v1.9.0) and other Kiota libraries fails to strip sensitive HTTP headers when following 3xx redirects to a different host or scheme. Only the Authorization header is removed; Cookie, Proxy-Authorization, and all custom headers are forwarded to the redirect target."}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-601", "description": "CWE-601: URL Redirection to Untrusted Site ('Open Redirect')"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-05-14T15:58:57.772Z"}}}, "cveMetadata": {"cveId": "CVE-2026-44503", "state": "PUBLISHED", "dateUpdated": "2026-05-14T19:51:10.682Z", "dateReserved": "2026-05-06T18:28:20.886Z", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "datePublished": "2026-05-14T15:58:57.772Z", "assignerShortName": "GitHub_M"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"product": "kiota-java", "vendor": "microsoft", "versions": [{"status": "affected", "version": "< 1.9.1"}]}, {"product": "Microsoft.Kiota.Abstractions", "vendor": "microsoft", "versions": [{"status": "affected", "version": "< 1.22.0"}]}, {"product": "github.com/microsoft/kiota-http-go", "vendor": "microsoft", "versions": [{"status": "affected", "version": "< 1.5.5"}]}, {"product": "kiota-typescript", "vendor": "microsoft", "versions": [{"status": "affected", "version": "< 1.0.0-preview.100"}]}, {"product": "microsoft-kiota-abstractions", "vendor": "microsoft", "versions": [{"status": "affected", "version": "< 1.9.1"}]}, {"product": "microsoft-kiota-http", "vendor": "microsoft", "versions": [{"status": "affected", "version": "< 1.9.9"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "The RedirectHandler middleware in microsoft/kiota-java (com.microsoft.kiota:microsoft-kiota-http-okHttp v1.9.0) and other Kiota libraries fails to strip sensitive HTTP headers when following 3xx redirects to a different host or scheme. Only the Authorization header is removed; Cookie, Proxy-Authorization, and all custom headers are forwarded to the redirect target."}, {"lang": "es", "value": "El middleware RedirectHandler en microsoft/kiota-java (com.microsoft.kiota:microsoft-kiota-http-okHttp v1.9.0) y otras bibliotecas Kiota no logra eliminar encabezados HTTP sensibles al seguir redirecciones 3xx a un host o esquema diferente. Solo se elimina el encabezado de autorizaci\u00f3n; Cookie, Proxy-Authorization y todos los encabezados personalizados se reenv\u00edan al objetivo de la redirecci\u00f3n."}], "id": "CVE-2026-44503", "lastModified": "2026-10-26T14:10:00.130", "metrics": {"cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 7.0, "baseSeverity": "HIGH", "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": "HIGH", "subIntegrityImpact": "NONE", "userInteraction": "PASSIVE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:N/VA:N/SC:H/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": "NONE", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-44503", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-05-14T18:02:08.790490Z", "version": "2.0.3"}}]}, "published": "2026-05-14T16:16:24.223", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/microsoft/kiota-java/security/advisories/GHSA-7j59-v9qr-6fq9"}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "url": "https://github.com/microsoft/kiota-java/security/advisories/GHSA-7j59-v9qr-6fq9"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-601"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,1.9.1)"}}], "enrichment": {"confidence": 95.0, "confidence_source": "inferred", "scores": [{"score": 95.0, "source": "inferred"}]}, "product": "kiota-abstractions", "vendor": "microsoft"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,1.9.9)"}}], "enrichment": {"confidence": 95.0, "confidence_source": "inferred", "scores": [{"score": 95.0, "source": "inferred"}]}, "product": "kiota-http", "vendor": "microsoft"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,1.5.5)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "manual", "scores": [{"score": 100.0, "source": "manual"}]}, "original": {"product": "github.com/microsoft/kiota-http-go", "source": "cna", "vendor": "microsoft"}, "product": "kiota-http-go", "vendor": "microsoft"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,1.9.1)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "cna", "scores": [{"score": 100.0, "source": "cna"}]}, "product": "kiota-java", "vendor": "microsoft"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,1.0.0-preview.100)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "cna", "scores": [{"score": 100.0, "source": "cna"}]}, "product": "kiota-typescript", "vendor": "microsoft"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,1.22.0)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "cna", "scores": [{"score": 100.0, "source": "cna"}]}, "product": "microsoft.kiota.abstractions", "vendor": "microsoft"}], "created": "2026-05-14T17:45:25.530921+00:00", "updated": "2026-05-17T19:41:46.925880+00:00", "vendors": ["microsoft", "microsoft$PRODUCT$kiota-abstractions", "microsoft$PRODUCT$kiota-http", "microsoft$PRODUCT$kiota-http-go", "microsoft$PRODUCT$kiota-java", "microsoft$PRODUCT$kiota-typescript", "microsoft$PRODUCT$microsoft.kiota.abstractions"]}