{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-59216",
                "options": [
                  {
                    "Exploitation": "poc"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-07-09T00:00:00+00:00",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-07-10T03:55:47.517Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "references": [
          {
            "tags": [
              "exploit"
            ],
            "url": "https://github.com/open-webui/open-webui/security/advisories/GHSA-74h3-cxq7-vc5q"
          }
        ],
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "open-webui",
          "vendor": "open-webui",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 0.10.0"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. Prior to 0.10.0, get_event_call delivered execute:python and execute:tool Socket.IO events to a client-supplied session_id after checking only that the session was connected, allowing authenticated users who learned another socket ID through ydoc:document:join to run code interpreter Python or tools in that user session. This issue is fixed in version 0.10.0."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 7.7,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "LOW",
            "scope": "CHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:N",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-94",
              "description": "CWE-94: Improper Control of Generation of Code (\u0027Code Injection\u0027)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-200",
              "description": "CWE-200: Exposure of Sensitive Information to an Unauthorized Actor",
              "lang": "en",
              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-639",
              "description": "CWE-639: Authorization Bypass Through User-Controlled Key",
              "lang": "en",
              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-862",
              "description": "CWE-862: Missing Authorization",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-07-09T16:48:55.663Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/open-webui/open-webui/security/advisories/GHSA-74h3-cxq7-vc5q",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/open-webui/open-webui/security/advisories/GHSA-74h3-cxq7-vc5q"
        },
        {
          "name": "https://github.com/open-webui/open-webui/pull/25763",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/open-webui/open-webui/pull/25763"
        },
        {
          "name": "https://github.com/open-webui/open-webui/commit/386ac958144dbbbf0aa6e268070d72b681a318aa",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/open-webui/open-webui/commit/386ac958144dbbbf0aa6e268070d72b681a318aa"
        },
        {
          "name": "https://github.com/open-webui/open-webui/releases/tag/v0.10.0",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/open-webui/open-webui/releases/tag/v0.10.0"
        }
      ],
      "source": {
        "advisory": "GHSA-74h3-cxq7-vc5q",
        "discovery": "UNKNOWN"
      },
      "title": "Open WebUI: Cross-user code-interpreter and tool execution via unvalidated Socket.IO event-caller session_id"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-59216",
    "datePublished": "2026-07-09T16:48:55.663Z",
    "dateReserved": "2026-07-02T21:05:02.924Z",
    "dateUpdated": "2026-07-10T03:55:47.517Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "open-webui"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.10.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-59216"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-200",
      "CWE-639",
      "CWE-862",
      "CWE-94"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-07-24T17:01:53Z",
    "nvd_published_at": "2026-07-09T17:17:02Z",
    "severity": "HIGH"
  },
  "details": "## Summary\n\nAn authenticated low-privilege user can execute arbitrary code-interpreter Python and tools inside **another** user\u0027s authenticated session. The Socket.IO event-caller (`get_event_call`) delivers `execute:python` / `execute:tool` events to a **client-supplied** `session_id` after only checking that the session is connected, never that it belongs to the requester. Combined with `ydoc:document:join`, which exposes the live socket ids of everyone in a shared note\u0027s collaboration room to any read-access participant, an attacker can target a victim\u0027s session and run attacker-chosen code/tools in the victim\u0027s browser context. When the victim is an administrator, that hijacked context reaches the admin-only Functions API, whose source is executed server-side, yielding remote code execution as the server process (root in the default container).\n\n## Affected component\n\n- `backend/open_webui/socket/main.py` \u2014 `get_event_call()` / `__event_caller__`\n- `backend/open_webui/main.py` \u2014 chat-completion metadata (`session_id` taken from the request body)\n\n## Root cause\n\nThe event-caller routes to a caller-controlled session id with no ownership check:\n\n```python\n# backend/open_webui/socket/main.py \u2014 get_event_call()\nasync def __event_caller__(event_data):\n    session_id = request_info[\u0027session_id\u0027]\n    if session_id not in SESSION_POOL:                 # only checks the session is connected\n        return {\u0027error\u0027: \u0027Client session disconnected.\u0027}\n    return await sio.call(\u0027events\u0027, {...}, to=session_id, ...)   # delivered to that sid\n```\n\n`session_id` originates from the request body and is never validated against the authenticated user:\n\n```python\n# backend/open_webui/main.py\nmetadata = {\n    \u0027user_id\u0027: user.id,                               # server-derived (trustworthy)\n    \u0027session_id\u0027: form_data.pop(\u0027session_id\u0027, None),  # client-controlled\n    ...\n}\n```\n\n`SESSION_POOL[session_id]` is the user record of whoever owns that socket. Because the caller checks only membership (`in SESSION_POOL`), a request carrying another user\u0027s `session_id` causes `execute:python` / `execute:tool` to be delivered to that other user\u0027s browser.\n\n## Reachability\n\n- `execute:python` / `execute:tool` are emitted from the code-interpreter and tool-call paths (`utils/middleware.py`, `tools/builtin.py`), all routed through `get_event_call`.\n- The victim\u0027s live `session_id` is disclosed to any read-access participant of a shared note via `ydoc:document:join`.\n- `POST /api/v1/chat/completions` requires only `get_verified_user` (the default user role). The attacker uses their own account and a model / Direct Connection they control to choose the payload.\n\n## Impact\n\n- **Any victim:** arbitrary code-interpreter Python and tool execution in the victim\u0027s authenticated session \u2014 the attacker acts with the victim\u0027s identity and origin (full session/account compromise).\n- **Admin victim:** the hijacked admin context reaches `POST /api/v1/functions/create`, whose source is `exec()`\u0027d server-side \u2192 remote code execution as the server process (root in the default container).\n\nThe Functions API is intended administrator code-execution; the vulnerability here is the cross-user delivery that lets an attacker drive another user\u0027s session \u2014 including an admin\u0027s \u2014 into it. The primitive is a full session compromise even against non-admin victims.\n\n## Proof of Concept\n\nThe reporter\u0027s `exploit.py` reproduced on `ghcr.io/open-webui/open-webui:0.9.6` and a build of the `v0.9.6` tag, confirming blind server-side RCE out-of-band (callback returns `uid=0(root)`), using only a low-privilege `user` account that shared a note with an admin victim. Preconditions: code interpreter enabled; attacker shares a note with the victim; victim opens it while online; admin victim required for server RCE.\n\n## Fix\n\n`get_event_call` must verify the target session belongs to the requesting user before delivering, not merely that it is connected:\n\n```python\nsession = SESSION_POOL.get(session_id)\nif session is None or session.get(\u0027id\u0027) != request_info.get(\u0027user_id\u0027):\n    return {\u0027error\u0027: \u0027Client session disconnected.\u0027}\n```\n\n`user_id` in the request metadata is server-derived from the authenticated user, so it is trustworthy. Restricting `ydoc:document:join` so it does not disclose other participants\u0027 socket ids is recommended as defence-in-depth.\n\n## Affected / Patched\n\n- Affected: `\u003c 0.10.0` (last affected release 0.9.6)\n- Patched: v0.10.0. `get_event_call` now verifies the target session belongs to the requesting user before delivering (`session is None or session.get(\u0027id\u0027) != request_info.get(\u0027user_id\u0027)`), using the server-derived `user_id` from the request metadata. The recommended `ydoc:document:join` sid-disclosure restriction is defence-in-depth and independent of this fix; the ownership check closes the cross-user delivery regardless of whether the victim\u0027s sid is known.",
  "id": "GHSA-74h3-cxq7-vc5q",
  "modified": "2026-07-24T17:01:53Z",
  "published": "2026-07-24T17:01:53Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/open-webui/open-webui/security/advisories/GHSA-74h3-cxq7-vc5q"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-59216"
    },
    {
      "type": "WEB",
      "url": "https://github.com/open-webui/open-webui/pull/25763"
    },
    {
      "type": "WEB",
      "url": "https://github.com/open-webui/open-webui/commit/386ac958144dbbbf0aa6e268070d72b681a318aa"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/open-webui/open-webui"
    },
    {
      "type": "WEB",
      "url": "https://github.com/open-webui/open-webui/releases/tag/v0.10.0"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Open WebUI: Cross-user code-interpreter and tool execution via unvalidated Socket.IO event-caller session_id"
}