{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "5.4.4"
              },
              {
                "introduced": "6.0.0"
              },
              {
                "fixed": "6.0.1"
              }
            ],
            "source": "AFFECTED_FIELD"
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "c131ad1d5ead98797c1fda800dc1202ba600b76a"
            },
            {
              "introduced": "ac7bf6f2104e37b7e0299ddaa5f752f04b3e59a3"
            },
            {
              "fixed": "fd4afeef6a6fc8bfb8817458bb9a85bf4c268b5e"
            }
          ],
          "repo": "https://github.com/formbricks/formbricks",
          "type": "GIT"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "mitre",
    "cwe_ids": [
      "CWE-863"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/105xxx/CVE-2026-105090.json"
  },
  "details": "Formbricks before 5.4.4 and 6 before 6.0.1 allows stored XSS. The survey-level Custom Head Scripts feature did not enforce the documented Manage permission boundary. A workspace member holding only readWrite permission could configure Custom Head Scripts on a survey, an operation the documentation restricts to the Manage role. Because the configured scripts execute in the authenticated browser session of any user who opens the affected survey, a lower-privileged member can run arbitrary JavaScript (stored cross-site scripting) in the session of higher-privileged users. Fixed versions require Manage access to modify survey Custom Head Scripts.",
  "id": "CVE-2026-105090",
  "modified": "2026-10-04T02:30:49.771239643Z",
  "published": "2026-10-03T01:59:10.911Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/105xxx/CVE-2026-105090.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-105090"
    },
    {
      "type": "FIX",
      "url": "https://github.com/formbricks/formbricks/pull/9432"
    },
    {
      "type": "FIX",
      "url": "https://github.com/formbricks/formbricks/releases/tag/5.4.4"
    },
    {
      "type": "FIX",
      "url": "https://github.com/formbricks/formbricks/releases/tag/6.0.1"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/formbricks/formbricks"
    },
    {
      "type": "ARTICLE",
      "url": "https://www.sec4check.pl/blog/posts/cve-formbricks-broken-access-control-stored-xss-custom-head-scripts.html"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "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",
      "type": "CVSS_V4"
    }
  ]
}