Flowintel Stored XSS in Calendar via Malicious Case Title

{
  "id": "716b197941821ba41f6d511973d80396102bf2f73c9ab3c19cb7fe330a193206",
  "url": "https://osv.dev/vulnerability/CVE-2026-81814",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Flowintel Stored XSS in Calendar via Malicious Case Title",
    "summary": "Affected versions of Flowintel render calendar event titles using innerHTML. Because those titles are derived from case titles, a user able to create or modify a case title could store HTML or script-capable content that is later interpreted by the browser when another user views the calendar. The fix changes: titleEl.innerHTML = arg.event.title to: titleEl.textContent = arg.event.title || '' and similarly stops using innerHTML for the static download icon. Version impacted =>3.3.0",
    "evidence": "osv:CVE-2026-81814",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2026-81814",
      "aliases": [
        "CVE-2026-81814"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/flowintel/flowintel",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "f224438eb495e6b0d4e465eb7f40ab771bbfdb76"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "3.3.0"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  },
                  {
                    "range": [
                      {
                        "fixed": "f224438eb495e6b0d4e465eb7f40ab771bbfdb76"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  }
                ]
              }
            }
          ],
          "versions": [
            "3.3.0",
            "3.2.0",
            "3.1.0",
            "3.0.0",
            "2.3.0",
            "2.2.1",
            "2.1.1",
            "2.1.0",
            "2.0.0",
            "1.6.2",
            "1.6.1",
            "1.6.0",
            "1.5.0",
            "1.4.1",
            "1.4.0",
            "1.3.1",
            "1.3.0",
            "1.2.0",
            "1.1.0",
            "1.0.0",
            "0.8.0",
            "0.7.0",
            "0.6.0",
            "0.5.1",
            "0.5.0",
            "0.4.0",
            "0.3.0",
            "0.2.1",
            "0.2.0",
            "0.1.0",
            "0.0.1"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-81814.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:36.091039268Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/81xxx/CVE-2026-81814.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-81814",
        "https://github.com/flowintel/flowintel/commit/f224438eb495e6b0d4e465eb7f40ab771bbfdb76.patch",
        "https://github.com/flowintel/flowintel"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-79"
        ],
        "cna_assigner": "CIRCL",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/81xxx/CVE-2026-81814.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-81814",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 503394,
  "published_at": "2026-08-27T12:48:39.314+00:00"
}