{"items":[{"id":"NVI-00015093","kind":"vulnerability","title":"Open WebUI: Stored web worker XSS via Pyodide","revision":2,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected.","NVD lastModified does not establish freshness of every associated CPE record."],"lifecycle":"active","identifiers":["GHSA-4r2p-27mh-5m22","CVE-2026-59214"],"plain_summary":"GitHub lists this reviewed advisory for open-webui. Published version ranges and source prerequisites are shown below; this is not an inspection of a visitor’s application.","review_status":"source_listed","control_topics":[],"public_actions":[{"summary":"Identify the exact component and deployed version, examine the linked publisher’s conditions, and retain evidence of any mitigation.","source_ids":["sr-597eb2f728cc3911a21b9a697938a415"],"action_type":"investigate","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null}],"schema_version":"1.1.0","source_metrics":[{"kind":"CVSS","as_of":"2026-07-24T16:54:42.000Z","value":"7.3 high","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-1e8f83770a3b2a0ea1862f469f9e6567"},{"kind":"CVSS","as_of":"2026-07-10T19:24:29.937Z","value":"7.3 HIGH (3.1)","meaning":"security-advisories@github.com severity; no combined Null risk score.","source_id":"sr-597eb2f728cc3911a21b9a697938a415"},{"kind":"CVSS","as_of":"2026-07-10T19:24:29.937Z","value":"9 CRITICAL (3.1)","meaning":"nvd@nist.gov severity; no combined Null risk score.","source_id":"sr-597eb2f728cc3911a21b9a697938a415"}],"why_it_matters":"Published affected context helps an owner decide what evidence to gather. This report has not examined your application.","related_sources":[{"id":"sr-1e8f83770a3b2a0ea1862f469f9e6567","url":"https://github.com/advisories/GHSA-4r2p-27mh-5m22","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-4r2p-27mh-5m22","publisher":"GitHub Advisory Database","observed_at":"2026-11-03T09:59:13.529Z"},{"id":"sr-597eb2f728cc3911a21b9a697938a415","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-59214","basis":"official_catalog","notes":"This product uses data from the NVD API but is not endorsed or certified by the NVD.","title":"CVE-2026-59214","publisher":"NIST National Vulnerability Database","observed_at":"2026-11-08T08:05:01.676Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-1e8f83770a3b2a0ea1862f469f9e6567"],"technology":"open-webui","known_exclusions":[],"conditions_summary":"**Title:** Same-origin Pyodide code execution allows server-side RCE via a shared chat\n\n### Summary\n\nOpen WebUI runs client-side Python (Pyodide) in a same-origin web worker. Through Pyodide's JavaScript API (`pyodide.http.pyfetch`, or the `js` module which exposes the page's `fetch` / `XMLHttpRequest`) executed Python can issue requests on the application origin, and those requests carry the victim's session cookie. A low-privileged user can store such a payload in a chat message, share the chat, and when a victim opens it and clicks **Run** the payload executes authenticated same-origin requests as the victim. When the victim is an admin (or a user holding `workspace.functions` / `workspace.tools` permissions) the payload creates a Function/Tool whose body runs server-side, yielding **remote code execution**.\n\n### Details\n\nPyodide's `js` bridge gives Python in the worker the same reach as inline JavaScript on the origin, and the worker is same-origin, so a credentialed request to the app's own API is authenticated as the victim. No separate XSS sink is required: storing the payload in a shared chat and having the victim run it is enough.\n\n```python\nfrom pyodide.http import pyfetc","public_affected_ranges":["< 0.10.0"]}],"null_published_at":"2026-11-08T19:53:44.059Z","source_updated_at":"2026-07-24T16:54:42.000Z","source_disclosed_at":"2026-07-24T16:54:40.000Z","is_synthetic_fixture":false,"null_last_reviewed_at":null,"public_change_summary":"Source facts changed; compare the preserved prior revision.","null_first_observed_at":"2026-11-03T09:59:13.529Z"},{"id":"NVI-00015093","kind":"vulnerability","title":"Open WebUI: Stored web worker XSS via Pyodide","revision":1,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-4r2p-27mh-5m22","CVE-2026-59214"],"plain_summary":"GitHub lists this reviewed advisory for open-webui. Published version ranges and source prerequisites are shown below; this is not an inspection of a visitor’s application.","review_status":"source_listed","control_topics":[],"public_actions":[{"summary":"Identify the exact component and deployed version, examine the linked publisher’s conditions, and retain evidence of any mitigation.","source_ids":["sr-1e8f83770a3b2a0ea1862f469f9e6567"],"action_type":"investigate","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null}],"schema_version":"1.1.0","source_metrics":[{"kind":"CVSS","as_of":"2026-07-24T16:54:42.000Z","value":"7.3 high","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-1e8f83770a3b2a0ea1862f469f9e6567"}],"why_it_matters":"Published affected context helps an owner decide what evidence to gather. This report has not examined your application.","related_sources":[{"id":"sr-1e8f83770a3b2a0ea1862f469f9e6567","url":"https://github.com/advisories/GHSA-4r2p-27mh-5m22","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-4r2p-27mh-5m22","publisher":"GitHub Advisory Database","observed_at":"2026-11-03T09:59:13.529Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-1e8f83770a3b2a0ea1862f469f9e6567"],"technology":"open-webui","known_exclusions":[],"conditions_summary":"**Title:** Same-origin Pyodide code execution allows server-side RCE via a shared chat\n\n### Summary\n\nOpen WebUI runs client-side Python (Pyodide) in a same-origin web worker. Through Pyodide's JavaScript API (`pyodide.http.pyfetch`, or the `js` module which exposes the page's `fetch` / `XMLHttpRequest`) executed Python can issue requests on the application origin, and those requests carry the victim's session cookie. A low-privileged user can store such a payload in a chat message, share the chat, and when a victim opens it and clicks **Run** the payload executes authenticated same-origin requests as the victim. When the victim is an admin (or a user holding `workspace.functions` / `workspace.tools` permissions) the payload creates a Function/Tool whose body runs server-side, yielding **remote code execution**.\n\n### Details\n\nPyodide's `js` bridge gives Python in the worker the same reach as inline JavaScript on the origin, and the worker is same-origin, so a credentialed request to the app's own API is authenticated as the victim. No separate XSS sink is required: storing the payload in a shared chat and having the victim run it is enough.\n\n```python\nfrom pyodide.http import pyfetc","public_affected_ranges":["< 0.10.0"]}],"null_published_at":"2026-11-03T10:03:26.547Z","source_updated_at":"2026-07-24T16:54:42.000Z","source_disclosed_at":"2026-07-24T16:54:40.000Z","is_synthetic_fixture":false,"null_last_reviewed_at":null,"public_change_summary":"First indexed by Null; source disclosure date is shown separately.","null_first_observed_at":"2026-11-03T09:59:13.529Z"}],"next_cursor":null,"snapshot_revision":"42594"}