{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "cpe": "cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*",
            "extracted_events": [
              {
                "introduced": "10.11.0"
              },
              {
                "fixed": "10.11.19"
              },
              {
                "introduced": "11.5.0"
              },
              {
                "fixed": "11.5.7"
              },
              {
                "introduced": "11.6.0"
              },
              {
                "fixed": "11.6.4"
              }
            ],
            "source": "CPE_RANGE"
          },
          "events": [
            {
              "introduced": "5b955468ea1ea8b56c0fb10feb258a36a767d7bb"
            },
            {
              "fixed": "4439c6121d009e1b7a16bad504e62627572cf157"
            },
            {
              "introduced": "9f2616376582893035a7e3cb38b0fab648bba4e8"
            },
            {
              "fixed": "7395f2ba2f17aa328fde4856101bb927aa80dc1f"
            },
            {
              "introduced": "d4f4e78835e86e2e76f76bfe797623076f5c9835"
            },
            {
              "fixed": "374d6843170180aea130e92a4925b26cbdafca5d"
            }
          ],
          "repo": "https://github.com/mattermost/mattermost",
          "type": "GIT"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Mattermost",
    "cwe_ids": [
      "CWE-693"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/3xxx/CVE-2026-3472.json",
    "unresolved_ranges": [
      {
        "extracted_events": [
          {
            "introduced": "10.11.0"
          },
          {
            "last_affected": "10.11.18"
          },
          {
            "introduced": "11.6.0"
          },
          {
            "last_affected": "11.6.3"
          },
          {
            "introduced": "11.5.0"
          },
          {
            "last_affected": "11.5.6"
          }
        ],
        "source": "AFFECTED_FIELD"
      }
    ]
  },
  "details": "Mattermost versions 10.11.x \u003c= 10.11.18, 11.6.x \u003c= 11.6.3, 11.5.x \u003c= 11.5.6 fail to properly apply markdown image rendering restrictions to AI bot tool result posts, which allows an authenticated attacker to exfiltrate data to an attacker-controlled server via injecting markdown image syntax into tool result content rendered by a victim's client.. Mattermost Advisory ID: MMSA-2026-00619",
  "id": "CVE-2026-3472",
  "modified": "2026-07-15T01:48:59.217209976Z",
  "published": "2026-06-26T14:42:24.154Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/3xxx/CVE-2026-3472.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://mattermost.com/security-updates"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-3472"
    }
  ],
  "schema_version": "1.8.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Markdown image rendering bypass in AI bot tool result posts in Mattermost"
}