{
  "canonical_id": "mattermost--CVE-2026-22545",
  "system_id": "mattermost",
  "display_name": "Mattermost",
  "category": "platforms",
  "advisory_mode": "core",
  "title": "Mattermost fails to validate user's authentication method when processing account auth type switch",
  "summary": "Mattermost versions 10.11.x <= 10.11.10 fail to validate user's authentication method when processing account auth type switch which allows an authenticated attacker to change account password without confirmation via falsely claiming a different auth provider.. Mattermost Advisory ID: MMSA-2026-00583",
  "published_at": "2026-03-16T15:30:47Z",
  "updated_at": "2026-03-19T19:31:20.982512Z",
  "severity": "low",
  "cvss_score": 3.1,
  "exploit_status": "unknown",
  "source_confidence": "ecosystem-authority",
  "official_source_url": "https://nvd.nist.gov/vuln/detail/CVE-2026-22545",
  "secondary_source_urls": [
    "https://github.com/mattermost/mattermost/commit/ced9a56e3988fe9fd4559d45f9971dbd562e2218",
    "https://github.com/mattermost/mattermost",
    "https://mattermost.com/security-updates"
  ],
  "aliases": [
    "CVE-2026-22545",
    "GHSA-rv67-7w2g-7976"
  ],
  "cve_ids": [
    "CVE-2026-22545"
  ],
  "ghsa_ids": [
    "GHSA-rv67-7w2g-7976"
  ],
  "osv_ids": [
    "GHSA-rv67-7w2g-7976"
  ],
  "affected_versions": [
    "introduced=0, fixed<8.0.0-20260127144908-ced9a56e3988",
    "introduced=0, fixed<5.3.2-0.20260127144908-ced9a56e3988",
    "introduced=10.11.0-rc1, fixed<10.11.11",
    "introduced=11.2.0-rc1, fixed<11.2.3",
    "introduced=11.3.0-rc1, fixed<11.3.1"
  ],
  "fixed_versions": [
    "8.0.0-20260127144908-ced9a56e3988",
    "5.3.2-0.20260127144908-ced9a56e3988",
    "10.11.11",
    "11.2.3",
    "11.3.1"
  ],
  "package_name": "github.com/mattermost/mattermost-server",
  "render_markdown": true,
  "case_path": "07-framework-security/platforms/mattermost/cases/mattermost-cve-2026-22545.md",
  "secure_code_topics": [
    "authz-server-side-recheck",
    "xss-output-encoding",
    "token-cookie-storage",
    "dependency-upgrade-policy"
  ],
  "status": "generated",
  "triage_reasons": [],
  "verification_status": "triage-manual",
  "verification_mode": "synthetic",
  "last_verified_at": null,
  "last_run_id": null,
  "evidence_bundle": null,
  "historical_status": null,
  "latest_status": null,
  "browser_evidence": {
    "required": false,
    "present": false,
    "refs": []
  },
  "repro_profile_id": "xss-generic",
  "artifact_mode": "synthetic",
  "blocked_reason": null,
  "metadata": {
    "source_names": [
      "OSV Mattermost"
    ],
    "source_kinds": [
      "osv-batch"
    ],
    "candidate_count": 1
  }
}