CVE-2026-42883

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-42883", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-04-30T18:49:06.711Z", "datePublished": "2026-05-11T19:51:43.211Z", "dateUpdated": "2026-05-12T16:32:16.291Z"}, "containers": {"cna": {"title": "Audiobookshelf: Cross-library file exfiltration via unscoped bulk download endpoint", "problemTypes": [{"descriptions": [{"cweId": "CWE-863", "lang": "en", "description": "CWE-863: Incorrect Authorization", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 6.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N", "version": "3.1"}}], "references": [{"name": "https://github.com/advplyr/audiobookshelf/security/advisories/GHSA-6rvg-w3f5-9gq5", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/advplyr/audiobookshelf/security/advisories/GHSA-6rvg-w3f5-9gq5"}], "affected": [{"vendor": "advplyr", "product": "audiobookshelf", "versions": [{"version": "< 2.32.2", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-05-11T19:51:43.211Z"}, "descriptions": [{"lang": "en", "value": "Audiobookshelf is a self-hosted audiobook and podcast server. Prior to 2.32.2, the GET /api/libraries/:id/download endpoint validates that the requesting user has access to the library specified in the URL path, but fetches downloadable items solely by attacker-provided IDs without constraining them to that library. An authenticated user with download permission and access to any one library can exfiltrate the full file contents of items belonging to any other library, including libraries they are explicitly denied access to. This vulnerability is fixed in 2.32.2."}], "source": {"advisory": "GHSA-6rvg-w3f5-9gq5", "discovery": "UNKNOWN"}}, "adp": [{"references": [{"url": "https://github.com/advplyr/audiobookshelf/security/advisories/GHSA-6rvg-w3f5-9gq5", "tags": ["exploit"]}], "metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-05-12T16:31:20.718221Z", "id": "CVE-2026-42883", "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": "2026-05-12T16:32:16.291Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"cna": {"title": "Audiobookshelf: Cross-library file exfiltration via unscoped bulk download endpoint", "source": {"advisory": "GHSA-6rvg-w3f5-9gq5", "discovery": "UNKNOWN"}, "metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 6.5, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}}], "affected": [{"vendor": "advplyr", "product": "audiobookshelf", "versions": [{"status": "affected", "version": "< 2.32.2"}]}], "references": [{"url": "https://github.com/advplyr/audiobookshelf/security/advisories/GHSA-6rvg-w3f5-9gq5", "name": "https://github.com/advplyr/audiobookshelf/security/advisories/GHSA-6rvg-w3f5-9gq5", "tags": ["x_refsource_CONFIRM"]}], "descriptions": [{"lang": "en", "value": "Audiobookshelf is a self-hosted audiobook and podcast server. Prior to 2.32.2, the GET /api/libraries/:id/download endpoint validates that the requesting user has access to the library specified in the URL path, but fetches downloadable items solely by attacker-provided IDs without constraining them to that library. An authenticated user with download permission and access to any one library can exfiltrate the full file contents of items belonging to any other library, including libraries they are explicitly denied access to. This vulnerability is fixed in 2.32.2."}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-863", "description": "CWE-863: Incorrect Authorization"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-05-11T19:51:43.211Z"}}, "adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-42883", "role": "CISA Coordinator", "options": [{"Exploitation": "poc"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-05-12T16:31:20.718221Z"}}}], "references": [{"url": "https://github.com/advplyr/audiobookshelf/security/advisories/GHSA-6rvg-w3f5-9gq5", "tags": ["exploit"]}], "providerMetadata": {"shortName": "CISA-ADP", "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "dateUpdated": "2026-05-12T16:32:04.794Z"}}]}, "cveMetadata": {"cveId": "CVE-2026-42883", "state": "PUBLISHED", "dateUpdated": "2026-05-11T19:51:43.211Z", "dateReserved": "2026-04-30T18:49:06.711Z", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "datePublished": "2026-05-11T19:51:43.211Z", "assignerShortName": "GitHub_M"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"product": "audiobookshelf", "vendor": "advplyr", "versions": [{"status": "affected", "version": "< 2.32.2"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Audiobookshelf is a self-hosted audiobook and podcast server. Prior to 2.32.2, the GET /api/libraries/:id/download endpoint validates that the requesting user has access to the library specified in the URL path, but fetches downloadable items solely by attacker-provided IDs without constraining them to that library. An authenticated user with download permission and access to any one library can exfiltrate the full file contents of items belonging to any other library, including libraries they are explicitly denied access to. This vulnerability is fixed in 2.32.2."}, {"lang": "es", "value": "Audiobookshelf es un servidor de audiolibros y podcasts autoalojado. Antes de 2.32.2, el endpoint GET /API/libraries/:id/download valida que el usuario solicitante tiene acceso a la biblioteca especificada en la ruta URL, pero obtiene elementos descargables \u00fanicamente mediante IDs proporcionados por el atacante sin restringirlos a esa biblioteca. Un usuario autenticado con permiso de descarga y acceso a cualquier biblioteca puede exfiltrar el contenido completo de los archivos de elementos pertenecientes a cualquier otra biblioteca, incluidas las bibliotecas a las que se les ha denegado expl\u00edcitamente el acceso. Esta vulnerabilidad est\u00e1 corregida en 2.32.2."}], "id": "CVE-2026-42883", "lastModified": "2026-10-26T18:10:00.173", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 6.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 3.6, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-42883", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-05-12T16:31:20.718221Z", "version": "2.0.3"}}]}, "published": "2026-05-11T20:25:44.593", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/advplyr/audiobookshelf/security/advisories/GHSA-6rvg-w3f5-9gq5"}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "url": "https://github.com/advplyr/audiobookshelf/security/advisories/GHSA-6rvg-w3f5-9gq5"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-863"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,2.32.2)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "audiobookshelf", "source": "cna", "vendor": "advplyr"}, "product": "audiobookshelf", "vendor": "advplyr"}], "created": "2026-05-11T22:45:36.359013+00:00", "updated": "2026-05-11T23:15:08.830219+00:00", "vendors": ["advplyr", "advplyr$PRODUCT$audiobookshelf"]}