{"id":"CVE-2026-109292","title":"Open WebUI from 0.6.27 before 0.11.4 contains an information disclosure vulnerability that allows destination servers to obtain user session cookies by receiving the full browser cookie jar on OAuth-mode connections","summary":"Open WebUI from 0.6.27 before 0.11.4 contains an information disclosure vulnerability that allows destination servers to obtain user session cookies by receiving the full browser cookie jar on OAuth-mode connections. Operators of OpenAI-…","severity":"medium","cvss":6.8,"cvssVector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N","cwe":["CWE-200"],"vendor":"open-webui","product":"open-webui","affected":["open-webui >= 0.6.27 < 0.11.4"],"published":"2026-10-12","updated":"2026-10-15","sourceUpdated":"2026-10-15T15:55:45.630","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-109292","references":[{"url":"https://github.com/open-webui/open-webui/commit/3cda47cdb449aac970426f0929c9e5f8bb8bd807","label":"disclosure@vulncheck.com"},{"url":"https://github.com/open-webui/open-webui/commit/b71744b17823f7a3a9a64cb363e79a7164ed5b23","label":"disclosure@vulncheck.com"},{"url":"https://github.com/open-webui/open-webui/commit/f9f815c86220f809fad5ee1300c44f55dea74c79","label":"disclosure@vulncheck.com"},{"url":"https://github.com/open-webui/open-webui/security/advisories/GHSA-gqfh-jxvw-74rp","label":"disclosure@vulncheck.com"},{"url":"https://www.vulncheck.com/advisories/open-webui-0.6.27-before-0.11.4-session-token-disclosure-via-oauth-mode-connections","label":"disclosure@vulncheck.com"},{"url":"https://github.com/open-webui/open-webui/security/advisories/GHSA-gqfh-jxvw-74rp","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"tags":["nvd","cve.org","exploit-available"],"epss":0.00409,"epssPercentile":0.35003,"exploitAvailable":true,"ssvc":{"exploitation":"poc","automatable":"no","technicalImpact":"total","timestamp":"2026-10-15T02:39:28.813205Z"},"ingestedAt":"2026-10-12T18:00:08.191Z","slug":"CVE-2026-109292","body":"## Overview\n\nOpen WebUI from 0.6.27 before 0.11.4 contains an information disclosure vulnerability that allows destination servers to obtain user session cookies by receiving the full browser cookie jar on OAuth-mode connections. Operators of OpenAI-compatible connections, OpenAPI tool servers or terminal servers can capture forwarded session cookies from routine requests and replay them to hijack accounts, including administrators.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":49,"depthScoreParts":{"impact":37.4,"likelihood":0.1,"exploitation":12,"ransomware":0},"changes":[{"seq":222048,"id":"CVE-2026-109292","ts":1792043627507,"field":"exploit_available","old":"false","new":"true"}]}