{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "21.1.10"
              },
              {
                "fixed": "22.0.11"
              },
              {
                "fixed": "23.0.3"
              }
            ],
            "source": "AFFECTED_FIELD"
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "e0f6d8f9fa96bdc19c201ad6fe7d891f36d6badb"
            },
            {
              "fixed": "e6e290a1472e64cf385ff9812ec7855bd1c590d5"
            },
            {
              "fixed": "762ccbe88196ef6162d8d5f80dd9a0ef723caa79"
            }
          ],
          "repo": "https://github.com/nextcloud/spreed",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-x75r-65hm-cw35"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-284"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/45xxx/CVE-2026-45266.json"
  },
  "details": "Nextcloud is an open source content collaboration platform. Prior to versions 21.1.10, 22.0.11, and 23.0.3, a low-privileged user can force other user's microphones to be muted in calls when no High-performance Backend is installed. This issue has been patched in versions 21.1.10, 22.0.11, and 23.0.3.",
  "id": "CVE-2026-45266",
  "modified": "2026-07-08T05:39:23.768956855Z",
  "published": "2026-06-01T16:39:56.879Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://hackerone.com/reports/3636758"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/45xxx/CVE-2026-45266.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/nextcloud/security-advisories/security/advisories/GHSA-x75r-65hm-cw35"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-45266"
    },
    {
      "type": "FIX",
      "url": "https://github.com/nextcloud/spreed/pull/17577"
    }
  ],
  "schema_version": "1.7.5",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Nextcloud: Unauthorized force-mute from missing permission check when using internal signaling"
}