{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "0"
                  },
                  {
                    "fixed": "3.0.1"
                  }
                ],
                "source": "AFFECTED_FIELD",
                "strategy": "StringRangeExpression"
              },
              {
                "range": [
                  {
                    "fixed": "849f7101d4370b29e716b2d7ee14a86c2f598f3a"
                  }
                ],
                "source": "REFERENCES_COMMIT"
              },
              {
                "original_tag": "v3.0.1",
                "range": [
                  {
                    "fixed": "fe346bc7fbb8644a128dd78719f3156fd5cc48a9"
                  }
                ],
                "source": "REFERENCES_TAG"
              }
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "fe346bc7fbb8644a128dd78719f3156fd5cc48a9"
            },
            {
              "fixed": "849f7101d4370b29e716b2d7ee14a86c2f598f3a"
            }
          ],
          "repo": "https://github.com/heyform/heyform",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-pxw5-pjrc-j758"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-79"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/102xxx/CVE-2026-102615.json"
  },
  "details": "HeyForm is an open-source form builder. Prior to 3.0.1, /api/upload accepts a file according to the client-controlled multipart file.mimetype while retaining an HTML filename, and static/upload serves the resulting file as text/html with contentSecurityPolicy: false. An ordinary user can therefore upload active HTML that executes on the HeyForm origin when a victim opens its returned URL. The same-origin script can access /graphql with the victim's session and read or modify data available to that account. The code also permits upload requests tied to an active public form through formId, openToken, and a fieldId belonging to a file or signature question, although the advisory did not fully verify that unauthenticated path end to end. This issue is fixed in version 3.0.1.",
  "id": "CVE-2026-102615",
  "modified": "2026-11-05T21:15:40.588281845Z",
  "published": "2026-11-05T15:32:30.406Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/102xxx/CVE-2026-102615.json"
    },
    {
      "type": "FIX",
      "url": "https://github.com/heyform/heyform/commit/849f7101d4370b29e716b2d7ee14a86c2f598f3a"
    },
    {
      "type": "WEB",
      "url": "https://github.com/heyform/heyform/releases/tag/v3.0.1"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/heyform/heyform/security/advisories/GHSA-pxw5-pjrc-j758"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-102615"
    }
  ],
  "schema_version": "1.9.2",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "HeyForm: Uploaded HTML files are served as text/html on the app origin with no CSP — stored XSS"
}