{"cve":"CVE-2026-45385","nvd":{"published":"2026-05-15T21:16:36.907","modified":"2026-06-17T10:51:59.400","status":"Analyzed","description":"Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.9.5, an IDOR vulnerability exists in the Channels feature of Open WebUI, allowing any channel member to modify messages sent by other members (including administrators) within the same channel. In the update_message_by_id function, for group or dm type channels, only the caller's membership in the channel is checked via the is_user_channel_member function, without verifying message ownership. This allows any channel member to modify messages sent by other members within the same channel. This vulnerability is fixed in 0.9.5.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N","score":4.3},"cwes":["CWE-639"],"references":["https://github.com/open-webui/open-webui/security/advisories/GHSA-wwhq-cx22-f7vv","https://github.com/open-webui/open-webui/security/advisories/GHSA-wwhq-cx22-f7vv"],"products":["openwebui:open_webui"],"source":"nvd","synced_at":"2026-10-19T22:35:16.954578616+00:00"},"epss":{"cve":"CVE-2026-45385","score":0.0025,"percentile":0.16419,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-wwhq-cx22-f7vv","url":"https://osv.dev/vulnerability/GHSA-wwhq-cx22-f7vv","summary":"Open WebUI has an IDOR vulnerability in the update_message_by_id API endpoint","modified":"2026-07-13T16:43:44.603801606Z","packages":[{"ecosystem":"PyPI","name":"open-webui","purl":"pkg:pypi/open-webui","ranges":["<0.9.5"],"fixed":["0.9.5"]}]},{"id":"PYSEC-2026-2767","url":"https://osv.dev/vulnerability/PYSEC-2026-2767","summary":"Open WebUI has an IDOR vulnerability in the update_message_by_id API endpoint","modified":"2026-07-13T16:32:05.727833196Z","packages":[{"ecosystem":"PyPI","name":"open-webui","purl":"pkg:pypi/open-webui","ranges":["<0.9.5"],"fixed":["0.9.5"]}]}],"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."]}