{"cve":"CVE-2026-44569","nvd":{"published":"2026-05-15T22:16:53.187","modified":"2026-06-17T10:50:48.590","status":"Analyzed","description":"Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.6.19, there's an IDOR in the channels message management system that allows authenticated users to modify or delete any message within channels they have read access to. The vulnerability exists in the message update and delete endpoints, which implement channel-level authorization but completely lack message ownership validation. While the frontend correctly implements ownership checks (showing edit/delete buttons only for message owners or admins), the backend APIs bypass these protections by only validating channel access permissions without verifying that the requesting user owns the target message. This creates a client-side security control bypass where attackers can directly call the APIs to modify other users' messages. This vulnerability is fixed in 0.6.19.","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:H/A:L","score":7.1},"cwes":["CWE-862"],"references":["https://github.com/open-webui/open-webui/security/advisories/GHSA-jxwr-g6r6-j3fx","https://github.com/open-webui/open-webui/security/advisories/GHSA-jxwr-g6r6-j3fx"],"products":["openwebui:open_webui"],"source":"nvd","synced_at":"2026-10-19T22:35:16.954578616+00:00"},"epss":{"cve":"CVE-2026-44569","score":0.00266,"percentile":0.18592,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-jxwr-g6r6-j3fx","url":"https://osv.dev/vulnerability/GHSA-jxwr-g6r6-j3fx","summary":"Open WebUI's Insecure Message Access Breaks Authorization","modified":"2026-07-13T16:42:27.775565703Z","packages":[{"ecosystem":"PyPI","name":"open-webui","purl":"pkg:pypi/open-webui","ranges":["<0.6.19"],"fixed":["0.6.19"]}]},{"id":"PYSEC-2026-2746","url":"https://osv.dev/vulnerability/PYSEC-2026-2746","summary":"Open WebUI's Insecure Message Access Breaks Authorization","modified":"2026-07-13T16:32:21.035751397Z","packages":[{"ecosystem":"PyPI","name":"open-webui","purl":"pkg:pypi/open-webui","ranges":["<0.6.19"],"fixed":["0.6.19"]}]}],"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."]}