{"id":"CVE-2026-109286","title":"Open WebUI from 0.7.0 before 0.11.4 contains a cross-origin message handling vulnerability in SyncStatsModal that allows any website to steal a signed-in user's session token by posting unvalidated verify:chat messages","summary":"Open WebUI from 0.7.0 before 0.11.4 contains a cross-origin message handling vulnerability in SyncStatsModal that allows any website to steal a signed-in user's session token by posting unvalidated verify:chat messages. Attackers can sup…","severity":"high","cvss":8.1,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N","cwe":["CWE-346"],"vendor":"open-webui","product":"open-webui","affected":["open-webui >= 0.7.0 < 0.11.4"],"published":"2026-10-12","updated":"2026-10-15","sourceUpdated":"2026-10-15T16:25:41.890","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-109286","references":[{"url":"https://github.com/open-webui/open-webui/security/advisories/GHSA-vpq8-f445-hcq7","label":"disclosure@vulncheck.com"},{"url":"https://www.vulncheck.com/advisories/open-webui-0.7.0-before-0.11.4-session-token-theft-via-syncstatsmodal","label":"disclosure@vulncheck.com"}],"tags":["nvd","cve.org"],"epss":0.00145,"epssPercentile":0.03748,"ingestedAt":"2026-10-12T18:00:08.189Z","ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-10-18T11:40:25.742028Z"},"slug":"CVE-2026-109286","body":"## Overview\n\nOpen WebUI from 0.7.0 before 0.11.4 contains a cross-origin message handling vulnerability in SyncStatsModal that allows any website to steal a signed-in user's session token by posting unvalidated verify:chat messages. Attackers can supply a path-traversal chat id redirecting the authenticated stats export request to the auths endpoint, receiving the victim's JWT for full API access.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":45,"depthScoreParts":{"impact":44.6,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}