{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "2.2.23"
              },
              {
                "introduced": "3.0.0"
              },
              {
                "fixed": "3.1.31"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "introduced": "e7ffa61f8600494e2f153f32ae457b651f400969"
            },
            {
              "fixed": "991719044cbcce152fc4153a2bcdc197b8390cf1"
            },
            {
              "fixed": "8420d6d20235c01ab4cd269bc5902fea88c7dbe6"
            },
            {
              "fixed": "323c2fe647a76fbccadf749728ee4ad9420efee1"
            },
            {
              "fixed": "78a298ac3baf85ac283988dfce9cd42c9b958f16"
            }
          ],
          "repo": "https://github.com/verbb/formie",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-584p-f93j-wpgc"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-639",
      "CWE-862"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/76xxx/CVE-2026-76087.json"
  },
  "details": "Formie is a Craft CMS plugin for creating forms. Prior to 2.2.23 and 3.1.31, Formie's anonymous formie/submissions/submit action in SubmissionsController::actionSubmit trusts a client-supplied submissionId when loading an incomplete submission without session binding, ownership validation, or a valid submissionEditToken. An unauthenticated attacker can enumerate sequential IDs and overwrite or hijack another user's in-progress multi-page or save-for-later submission, and the modified data can be persisted and forwarded through notifications or integrations when the submission is completed. This is an incomplete remediation of CVE-2026-47266 because that earlier change validated edit tokens for save-submission but did not protect submit. Completed submissions are excluded by the isIncomplete filter. This issue is fixed in versions 2.2.23 and 3.1.31.",
  "id": "CVE-2026-76087",
  "modified": "2026-10-02T03:30:55.640238681Z",
  "published": "2026-09-23T18:35:45.304Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/verbb/formie/releases/tag/2.2.23"
    },
    {
      "type": "WEB",
      "url": "https://github.com/verbb/formie/releases/tag/3.1.31"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/76xxx/CVE-2026-76087.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/verbb/formie/security/advisories/GHSA-584p-f93j-wpgc"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-76087"
    },
    {
      "type": "FIX",
      "url": "https://github.com/verbb/formie/commit/323c2fe647a76fbccadf749728ee4ad9420efee1"
    },
    {
      "type": "FIX",
      "url": "https://github.com/verbb/formie/commit/78a298ac3baf85ac283988dfce9cd42c9b958f16"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Formie: Unauthenticated users can overwrite incomplete submissions via submit action"
}