{"cve":"CVE-2026-54022","nvd":{"published":"2026-06-23T18:18:07.487","modified":"2026-06-25T14:12:50.190","status":"Analyzed","description":"Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.8.11, the ydoc:document:join Socket.IO handler checks note ownership only when the document_id starts with note: (colon). However, the YdocManager storage layer normalizes all document IDs by replacing colons with underscores (document_id.replace(\":\", \"_\")). An attacker can join a document room using note_<id> (underscore) instead of note:<id> (colon), bypassing the authorization check entirely while accessing the same underlying Yjs document. The server then returns the full document state, leaking the victim's private note contents. This vulnerability is fixed in 0.8.11.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N","score":5.3},"cwes":["CWE-706","CWE-863"],"references":["https://github.com/open-webui/open-webui/security/advisories/GHSA-8788-j68r-3cgh","https://github.com/open-webui/open-webui/security/advisories/GHSA-8788-j68r-3cgh"],"products":["openwebui:open_webui"],"source":"nvd","synced_at":"2026-10-19T22:41:17.107060303+00:00"},"epss":{"cve":"CVE-2026-54022","score":0.00347,"percentile":0.28337,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-8788-j68r-3cgh","url":"https://osv.dev/vulnerability/GHSA-8788-j68r-3cgh","summary":"Open WebUI: Any authenticated user can read other users' private notes via Socket.IO","modified":"2026-07-20T21:15:27.282408959Z","packages":[{"ecosystem":"PyPI","name":"open-webui","purl":"pkg:pypi/open-webui","ranges":["<0.8.11"],"fixed":["0.8.11"]}]},{"id":"PYSEC-2026-2712","url":"https://osv.dev/vulnerability/PYSEC-2026-2712","summary":"Open WebUI: Any authenticated user can read other users' private notes via Socket.IO","modified":"2026-07-13T16:32:18.789132190Z","packages":[{"ecosystem":"PyPI","name":"open-webui","purl":"pkg:pypi/open-webui","ranges":["<0.8.11"],"fixed":["0.8.11"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}