{"action":"Upgrade open-webui to 0.11.1 or later.","affected":[{"fixed":"0.11.1","introduced":"0.9.5"}],"component":"open-webui","cve_ids":["CVE-2026-87994"],"ecosystem":"PyPI","epss":0.00372,"exploited":false,"fixed_versions":["0.11.1"],"ghsa_id":"GHSA-fmqh-xp37-5hr8","id":"tcs_01M5KHA1TTKNFWGKS4Q0D0GGWP","modified_at":"2026-10-01T17:45:12.755347923Z","published_at":"2026-10-01T16:38:29.801621Z","references":["https://osv.dev/vulnerability/PYSEC-2026-4122","https://github.com/open-webui/open-webui/security/advisories/GHSA-fmqh-xp37-5hr8","https://nvd.nist.gov/vuln/detail/CVE-2026-87994","https://github.com/open-webui/open-webui/pull/28631","https://github.com/open-webui/open-webui/commit/7d392bedc9c1aaecc94509a58e59186b614433dc","https://github.com/open-webui/open-webui","https://github.com/open-webui/open-webui/releases/tag/v0.11.1","https://pypi.org/project/open-webui","https://github.com/advisories/GHSA-fmqh-xp37-5hr8"],"severity":{"label":"medium","score":4.3},"sources":[{"source":"osv","source_id":"PYSEC-2026-4122","url":"https://osv.dev/vulnerability/PYSEC-2026-4122"}],"summary":"Open WebUI: Channel members can overwrite another member's message via the chat completions endpoint"}