{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-54007",
                "options": [
                  {
                    "Exploitation": "poc"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-06-26T19:27:54.187253Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-06-26T19:28:13.499Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "references": [
          {
            "tags": [
              "exploit"
            ],
            "url": "https://github.com/open-webui/open-webui/security/advisories/GHSA-3vv5-8xxp-4f55"
          }
        ],
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "open-webui",
          "vendor": "open-webui",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 0.9.6"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.9.6, the chat message listener allows non-same-origin input:prompt and action:submit messages, so an external site can set prompt text and trigger submitPrompt() in an authenticated victim session. I validated this with a cross-origin attacker page that auto-posted messages and caused unauthorized POST /api/v1/chats/new and POST /api/chat/completions requests containing attacker-controlled prompts. This enables cross-site forced actions and model/tool execution under victim privileges without consent. This vulnerability is fixed in 0.9.6."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "NETWORK",
            "baseScore": 7.1,
            "baseSeverity": "HIGH",
            "privilegesRequired": "NONE",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "PASSIVE",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N",
            "version": "4.0",
            "vulnAvailabilityImpact": "NONE",
            "vulnConfidentialityImpact": "NONE",
            "vulnIntegrityImpact": "HIGH"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-346",
              "description": "CWE-346: Origin Validation Error",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-06-23T16:51:27.546Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/open-webui/open-webui/security/advisories/GHSA-3vv5-8xxp-4f55",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/open-webui/open-webui/security/advisories/GHSA-3vv5-8xxp-4f55"
        }
      ],
      "source": {
        "advisory": "GHSA-3vv5-8xxp-4f55",
        "discovery": "UNKNOWN"
      },
      "title": "Open WebUI: Cross-origin postMessage confirmation bypass via action:submit"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-54007",
    "datePublished": "2026-06-23T16:51:27.546Z",
    "dateReserved": "2026-06-11T16:34:11.635Z",
    "dateUpdated": "2026-06-26T19:28:13.499Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

{
  "affected": [
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 0.9.5"
      },
      "package": {
        "ecosystem": "PyPI",
        "name": "open-webui"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.9.6"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-54007"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-346"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-06-17T14:10:35Z",
    "nvd_published_at": null,
    "severity": "HIGH"
  },
  "details": "### Summary\n\nThe chat message listener allows non-same-origin `input:prompt` and `action:submit` messages, so an external site can set prompt text and trigger `submitPrompt()` in an authenticated victim session. I validated this with a cross-origin attacker page that auto-posted messages and caused unauthorized `POST /api/v1/chats/new` and `POST /api/chat/completions` requests containing attacker-controlled prompts. This enables cross-site forced actions and model/tool execution under victim privileges without consent.\n\n### Details\n\nThe chat page\u0027s window message listener in `src/lib/components/chat/Chat.svelte` processes message types including `input:prompt` and `action:submit` without adequately enforcing same-origin restrictions. Based on code around lines ~597-616, input text is set directly from `event.data.text`; `action:submit` proceeds to `submitPrompt()` on the current prompt. The logic does not apply a strict origin allowlist and permits non-same-origin control of the chat input and submission flow, leading to cross-origin command execution in the victim\u0027s authenticated UI context. As a result, backend API calls (e.g., `POST /api/v1/chats/new`, `POST /api/chat/completions`) are sent under victim credentials.\n\nNormally, via the `input:prompt:submit` postMessage type, this results in a \"Confirm Prompt from Embed\" confirmation dialog:\n\nhttps://github.com/open-webui/open-webui/blob/9bd84258d09eefe7bf975878fb0e31a5dadfe0f8/src/lib/components/chat/Chat.svelte#L604-L622\n\nHowever, combining the two other types, it is possible to achieve the same effect without this confirmation:\n\nhttps://github.com/open-webui/open-webui/blob/9bd84258d09eefe7bf975878fb0e31a5dadfe0f8/src/lib/components/chat/Chat.svelte#L584-L602\n\n### PoC\n\n1. Set up a local Open WebUI instance and log in to it, making sure a model is configured\n2. Host the following HTML anywhere and visit it (optionally change http://127.0.0.1:14000 to your instance Base URL):\n\n```html\n\u003ch1\u003eClick anywhere\u003c/h1\u003e\n\u003cscript\u003e\n  function sleep(ms) {\n    return new Promise(r =\u003e setTimeout(r, ms));\n  }\n  \n  onclick = async () =\u003e {\n    w = window.open(\u0027http://127.0.0.1:14000\u0027);\n    await sleep(2000);\n    w.postMessage({ type: \u0027input:prompt\u0027, text: \"INJECTED PROMPT\" }, \u0027*\u0027);\n    await sleep(500);\n    w.postMessage({ type: \u0027action:submit\u0027 }, \u0027*\u0027);\n  }\n\u003c/script\u003e\n```\n\n3. Click anywhere on the page, then notice without further interaction the \"INJECTED PROMPT\" is executed on the Open WebUI instance\n\n\u003cimg width=\"874\" height=\"264\" alt=\"image\" src=\"https://github.com/user-attachments/assets/244d9015-0dbf-47e0-a30e-1c2fbbde5e58\" /\u003e\n\n### Impact\n\nConditions required: The victim must be authenticated to Open WebUI in the browser (token cookie present).\n\nThis issue enables cross-site forced actions under the victim\u0027s identity. An attacker can silently inject prompts and trigger model/tool execution (e.g., code interpreter, web search, retrieval, terminal/tool servers) as the victim without confirmation.\n\n### Original Agent Report\n\n\u003cimg width=\"400\" alt=\"app aikido dev_ai-pentests_projects_116389_assessments_019d67d4-81c8-7dd2-bb9e-0a4a774b2c78_issues_sidebarIssue=20439940 (4)\" src=\"https://github.com/user-attachments/assets/7b6521ed-d08b-446d-a918-103523d08a1e\" /\u003e",
  "id": "GHSA-3vv5-8xxp-4f55",
  "modified": "2026-06-17T14:10:35Z",
  "published": "2026-06-17T14:10:35Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/open-webui/open-webui/security/advisories/GHSA-3vv5-8xxp-4f55"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/open-webui/open-webui"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Open WebUI: Cross-origin postMessage confirmation bypass via action:submit"
}