{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "cpe": "cpe:2.3:a:mattermost:legal_hold:*:*:*:*:*:mattermost:*:*",
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "1.1.5"
              }
            ],
            "source": "CPE_RANGE"
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "8c830da21205c49d78929e1151384ccb10e14d97"
            }
          ],
          "repo": "https://github.com/mattermost/mattermost-plugin-legal-hold",
          "type": "GIT"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Mattermost",
    "cwe_ids": [
      "CWE-862"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/3xxx/CVE-2026-3524.json",
    "unresolved_ranges": [
      {
        "extracted_events": [
          {
            "last_affected": "1.1.4"
          }
        ],
        "source": "AFFECTED_FIELD"
      }
    ]
  },
  "details": "Mattermost Plugin Legal Hold versions \u003c=1.1.4 fail to halt request processing after a failed authorization check in ServeHTTP which allows an authenticated attacker to access, create, download, and delete legal hold data via crafted API requests to the plugin's endpoints. Mattermost Advisory ID: MMSA-2026-00621",
  "id": "CVE-2026-3524",
  "modified": "2026-08-12T03:51:09.629844920Z",
  "published": "2026-04-06T12:06:22.092Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/3xxx/CVE-2026-3524.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://mattermost.com/security-updates"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-3524"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Authorization Bypass in Mattermost Legal Hold Plugin Due to Missing Return After Permission Check"
}