{"id":"CVE-2026-109295","published":"2026-10-12T17:17:22.950","lastModified":"2026-10-15T15:55:45.630","description":"Open WebUI from 0.11.0 before 0.11.4 contains a regular expression denial of service vulnerability that allows authenticated users to stall server workers via file search patterns. Attackers can instruct the model to call grep_knowledge_files or grep_chat_files with a catastrophically backtracking regex, blocking the event loop for two seconds per repeated call.","cvssScore":6.5,"cvssSeverity":"MEDIUM","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","cwes":["CWE-1333"],"vendors":[],"products":[],"references":[{"url":"https://github.com/open-webui/open-webui/security/advisories/GHSA-gfjp-5hc9-852r","tags":[]},{"url":"https://www.vulncheck.com/advisories/open-webui-0.11.0-before-0.11.4-redos-via-grep-knowledge-files-event-loop","tags":[]},{"url":"https://github.com/open-webui/open-webui/security/advisories/GHSA-gfjp-5hc9-852r","tags":[]}],"exploitRefs":[{"url":"https://github.com/open-webui/open-webui/security/advisories/GHSA-gfjp-5hc9-852r","tags":[]},{"url":"https://github.com/open-webui/open-webui/security/advisories/GHSA-gfjp-5hc9-852r","tags":[]}],"hasPoc":true,"ai":null}