MS Teams plugin sensitive config values not properly masked in support packets

{
  "id": "5cf3e58e174ea3ae2bec98ef79f519cff274cac96e34d66ed89209279cfc6b47",
  "url": "https://osv.dev/vulnerability/CVE-2026-2476",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "MS Teams plugin sensitive config values not properly masked in support packets",
    "summary": "Mattermost Plugins versions <=2.0.3.0 fail to properly mask sensitive configuration values which allows an attacker with access to support packets to obtain original plugin settings via exported configuration data. Mattermost Advisory ID: MMSA-2026-00606",
    "evidence": "osv:CVE-2026-2476",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-2476",
      "aliases": [
        "CVE-2026-2476",
        "GHSA-4ppj-6chv-5pgc",
        "GO-2026-4784"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:L/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/mattermost/mattermost-plugin-msteams",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "938e7ad9acfa5f9fb21dbf8890ca76f4ce42ac67"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:mattermost:ms_teams:*:*:*:*:*:mattermost:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "2.3.1"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v2.3.0-rc1",
            "v2.3.0",
            "v2.2.2",
            "v2.2.1",
            "v2.2.0",
            "v2.2.0-rc17",
            "v2.2.0-rc16",
            "v2.2.0-rc15",
            "v2.2.0-rc14",
            "v2.2.0-rc13",
            "v2.2.0-rc12",
            "v2.2.0-rc11",
            "v2.2.0-rc10",
            "v2.2.0-rc9",
            "v2.2.0-rc8",
            "v2.2.0-rc7",
            "v2.2.0-rc6",
            "v2.2.0-rc5",
            "v2.2.0-rc4",
            "v2.2.0-rc3",
            "v2.2.0-rc2",
            "v2.2.0-rc1",
            "v2.1.1",
            "v2.1.0",
            "v2.0.3",
            "v2.0.2",
            "v2.0.1",
            "v2.0.0",
            "v1.15.0",
            "v1.14.0",
            "v1.13.0",
            "v1.12.0",
            "v1.11.0",
            "v1.10.1",
            "v1.10.0",
            "v1.9.1",
            "v1.9.0",
            "v1.8.2",
            "v1.8.1",
            "v1.8.0",
            "v1.7.0",
            "v1.6.1",
            "v1.6.0",
            "v1.5.3",
            "v1.5.2",
            "v1.5.1",
            "v1.5.0",
            "v1.4.0-rc1",
            "v1.4.0",
            "v1.3.1",
            "v1.3.0",
            "v1.2.0",
            "v1.1.0",
            "v1.0.8",
            "v1.0.7",
            "v1.0.6",
            "v1.0.5",
            "v1.0.4",
            "v1.0.3",
            "v1.0.2",
            "v1.0.1",
            "v1.0.0",
            "v0.3.13",
            "v0.3.12",
            "v0.3.10",
            "v0.3.9",
            "v0.3.8",
            "v0.3.7",
            "v0.3.6",
            "v0.3.5",
            "v0.3.4",
            "v0.3.3",
            "v0.3.2",
            "v0.3.1",
            "v0.3.0",
            "v0.2.0",
            "v0.0.1",
            "0.0.1-alpha"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-2476.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:53.352512105Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/2xxx/CVE-2026-2476.json",
        "https://mattermost.com/security-updates",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-2476"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-200"
        ],
        "cna_assigner": "Mattermost",
        "unresolved_ranges": [
          {
            "extracted_events": [
              {
                "range": [
                  {
                    "last_affected": "2.0.3"
                  }
                ],
                "source": "AFFECTED_FIELD",
                "strategy": "StandardRange"
              }
            ]
          }
        ],
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/2xxx/CVE-2026-2476.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-2476",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 522343,
  "published_at": "2026-03-16T11:11:07.387+00:00"
}