{"cve":"CVE-2026-59714","nvd":{"published":"2026-08-13T20:17:23.280","modified":"2026-09-18T20:09:01.757","status":"Deferred","description":"Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.9.5 before 0.10.0, any authenticated user can overwrite the content of a message in a channel they do not belong to (including private and DM channels) by sending a chat completion request with a channel:-prefixed chat_id and a target message_id. The channel: path routes pipeline output through _make_channel_emitter, which writes to the Messages table using the caller-supplied message_id without binding it to the channel. This issue is fixed in version 0.10.0.","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/commit/ac3449cac91e62b08a7c28e54fcd044d14dea791","https://github.com/open-webui/open-webui/pull/26385","https://github.com/open-webui/open-webui/releases/tag/v0.10.0","https://github.com/open-webui/open-webui/security/advisories/GHSA-x2ff-v5v8-m75m"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:48:17.459049833+00:00"},"epss":{"cve":"CVE-2026-59714","score":0.00478,"percentile":0.41261,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-x2ff-v5v8-m75m","url":"https://osv.dev/vulnerability/GHSA-x2ff-v5v8-m75m","summary":"Open WebUI: Cross-channel message overwrite via chat completion API (single-model and multimodel message_ids)","modified":"2026-08-04T14:40:35.091930908Z","packages":[{"ecosystem":"PyPI","name":"open-webui","purl":"pkg:pypi/open-webui","ranges":[">=0.9.5 <0.10.0"],"fixed":["0.10.0"]}]},{"id":"PYSEC-2026-3605","url":"https://osv.dev/vulnerability/PYSEC-2026-3605","summary":"Open WebUI: Cross-channel message overwrite via chat completion API (single-model and multimodel message_ids)","modified":"2026-08-04T14:30:29.962228635Z","packages":[{"ecosystem":"PyPI","name":"open-webui","purl":"pkg:pypi/open-webui","ranges":[">=0.9.5 <0.10.0"],"fixed":["0.10.0"]}]}],"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."]}