{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "cpe": "cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*",
            "extracted_events": [
              {
                "introduced": "10.11.0"
              },
              {
                "fixed": "10.11.12"
              },
              {
                "introduced": "11.2.0"
              },
              {
                "fixed": "11.2.4"
              },
              {
                "introduced": "11.3.0"
              },
              {
                "fixed": "11.3.2"
              },
              {
                "introduced": "11.4.0"
              },
              {
                "fixed": "11.4.1"
              }
            ],
            "source": "CPE_RANGE"
          },
          "events": [
            {
              "introduced": "5b955468ea1ea8b56c0fb10feb258a36a767d7bb"
            },
            {
              "fixed": "e1a78d1e9111eb77008014c8fec345708c74e756"
            },
            {
              "introduced": "ab7b138824c61fe1fe815243d7e2a914dec49c8b"
            },
            {
              "fixed": "eda9f2a1fe66177a6dd6e96d8294e50f9bf4228d"
            },
            {
              "introduced": "d27a2195068ddfa3ce17cf470f9739e4edb94b83"
            },
            {
              "fixed": "b7d4a1f1f59b645a7598181d33cfc537ea9a6c9c"
            },
            {
              "introduced": "2a1ac98bd3fae587927adf9340ba266c8c02018e"
            },
            {
              "fixed": "84f62bb0c14a45a200af7f4dbe7186915865495f"
            }
          ],
          "repo": "https://github.com/mattermost/mattermost",
          "type": "GIT"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Mattermost",
    "cwe_ids": [
      "CWE-754"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/20xxx/CVE-2026-20719.json",
    "unresolved_ranges": [
      {
        "extracted_events": [
          {
            "introduced": "11.4.0"
          },
          {
            "last_affected": "11.4.0"
          },
          {
            "introduced": "11.3.0"
          },
          {
            "last_affected": "11.3.1"
          },
          {
            "introduced": "11.2.0"
          },
          {
            "last_affected": "11.2.3"
          },
          {
            "introduced": "10.11.0"
          },
          {
            "last_affected": "10.11.11"
          }
        ],
        "source": "AFFECTED_FIELD"
      }
    ]
  },
  "details": "Mattermost versions 11.4.x \u003c= 11.4.0, 11.3.x \u003c= 11.3.1, 11.2.x \u003c= 11.2.3, 10.11.x \u003c= 10.11.11 fail to prevent rendering of external SVGs on link embeds which allows unauthenticated users to crash the Mattermost webapp and desktop app via creating an issue or PR on GitHub.. Mattermost Advisory ID: MMSA-2026-00595",
  "id": "CVE-2026-20719",
  "modified": "2026-07-08T05:37:30.864847194Z",
  "published": "2026-03-25T16:30:47.041Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/20xxx/CVE-2026-20719.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://mattermost.com/security-updates"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-20719"
    }
  ],
  "schema_version": "1.7.5",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L",
      "type": "CVSS_V3"
    }
  ],
  "summary": "DoS via URL Previews Rendering Malicious SVGs"
}