CVE-2026-73090

{
  "id": "CVE-2026-73090",
  "sourceIdentifier": "[email protected]",
  "published": "2026-08-11T18:18:26.210",
  "lastModified": "2026-10-24T15:10:00.190",
  "vulnStatus": "Deferred",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "PeerTube is an ActivityPub-federated video streaming platform. Prior to 8.2.2, processUpdateActivity and processUpdateVideo accept an ActivityPub Update containing a Video object without verifying that byActor.url is authorized for the host in videoObject.id, allowing a malicious federated server to rewrite another server's video metadata, visibility, media file, and HLS URLs. This issue is fixed in version 8.2.2."
    },
    {
      "lang": "es",
      "value": "PeerTube es una plataforma de transmisión de video federada con ActivityPub. Antes de la versión 8.2.2, processUpdateActivity y processUpdateVideo aceptan una actualización de ActivityPub que contiene un objeto Video sin verificar que byActor.url esté autorizado para el host en videoObject.id, lo que permite a un servidor federado malicioso reescribir los metadatos de video, la visibilidad, el archivo multimedia y las URL HLS de otro servidor. Este problema está solucionado en la versión 8.2.2."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "Chocobozzz",
          "product": "PeerTube",
          "versions": [
            {
              "version": "< 8.2.2",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:H/A:N",
          "baseScore": 9.3,
          "baseSeverity": "CRITICAL",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "NONE",
          "userInteraction": "NONE",
          "scope": "CHANGED",
          "confidentialityImpact": "LOW",
          "integrityImpact": "HIGH",
          "availabilityImpact": "NONE"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 4.7
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-08-13T14:06:14.677948Z",
          "id": "CVE-2026-73090",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-863"
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://github.com/Chocobozzz/PeerTube/commit/63d487d2a4a2a0e36af8c0ccb888cd23725bf7f2",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/Chocobozzz/PeerTube/releases/tag/v8.2.2",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/Chocobozzz/PeerTube/security/advisories/GHSA-g9p4-f7h8-hc86",
      "source": "[email protected]"
    }
  ]
}