CVE-2026-43874

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{"affected": [{"affectedData": [{"product": "AVideo", "vendor": "WWBN", "versions": [{"status": "affected", "version": "<= 29.0"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "WWBN AVideo is an open source video platform. In versions up to and including 29.0, the server-side mitigation for the YPTSocket autoEvalCodeOnHTML eval sink (from CVE-2026-40911) only strips the payload when it sits under $json['msg'], but the relay function msgToResourceId() selects the outbound message from $msg['json'] before $msg['msg']. An unauthenticated attacker can obtain a WebSocket token from plugin/YPTSocket/getWebSocket.json.php, connect to the WebSocket server, and send a message with autoEvalCodeOnHTML nested under a top-level json field \u2014 the strip branch is skipped, the relay delivers the payload verbatim to any logged-in user identified by to_users_id, and the client script runs it through eval(). Commit 9f3006f9a89a34daa67a83c6ad35f450cb91fcce contains an updated fix."}, {"lang": "es", "value": "WWBN AVideo es una plataforma de video de c\u00f3digo abierto. En versiones hasta la 29.0 inclusive, la mitigaci\u00f3n del lado del servidor para el eval sink autoEvalCodeOnHTML de YPTSocket (de CVE-2026-40911) solo elimina la carga \u00fatil cuando se encuentra bajo $json[\u2019msg\u2019], pero la funci\u00f3n de retransmisi\u00f3n msgToResourceId() selecciona el mensaje saliente de $msg[\u2019json\u2019] antes de $msg[\u2019msg\u2019]. Un atacante no autenticado puede obtener un token de WebSocket de plugin/YPTSocket/getWebSocket.json.php, conectarse al servidor WebSocket y enviar un mensaje con autoEvalCodeOnHTML anidado bajo un campo json de nivel superior - la rama de eliminaci\u00f3n se omite, la retransmisi\u00f3n entrega la carga \u00fatil textualmente a cualquier usuario conectado identificado por to_users_id, y el script del cliente lo ejecuta a trav\u00e9s de eval(). El commit 9f3006f9a89a34daa67a83c6ad35f450cb91fcce contiene una correcci\u00f3n actualizada."}], "id": "CVE-2026-43874", "lastModified": "2026-10-26T18:10:00.173", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 7.2, "baseSeverity": "HIGH", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 2.7, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-43874", "options": [{"exploitation": "poc"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-05-12T13:23:59.294265Z", "version": "2.0.3"}}]}, "published": "2026-05-11T21:19:02.120", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/WWBN/AVideo/commit/9f3006f9a89a34daa67a83c6ad35f450cb91fcce"}, {"source": "security-advisories@github.com", "url": "https://github.com/WWBN/AVideo/security/advisories/GHSA-ghcv-22jf-vfxm"}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "url": "https://github.com/WWBN/AVideo/security/advisories/GHSA-ghcv-22jf-vfxm"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-94"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[0,29.0]"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "AVideo", "source": "cna", "vendor": "WWBN"}, "product": "avideo", "vendor": "wwbn"}], "created": "2026-05-11T22:30:07.834464+00:00", "updated": "2026-05-11T22:45:36.342961+00:00", "vendors": ["wwbn", "wwbn$PRODUCT$avideo"]}