{"id":"CVE-2026-87012","title":"Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform","summary":"Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.9.0 until 0.11.1, backend/open_webui/models/calendar.py stored the calendar event meta.alert_minutes value without type validation and the share…","severity":"medium","cvss":4.3,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L","cwe":["CWE-754","CWE-1287"],"vendor":"openwebui","product":"open_webui","affected":["open_webui >= 0.9.0, < 0.11.1"],"patched":["open_webui 0.11.1"],"published":"2026-09-09","updated":"2026-09-15","sourceUpdated":"2026-09-15T16:17:55.943","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-87012","references":[{"url":"https://github.com/open-webui/open-webui/commit/abc69000b33b4894fbd97fc2c962139cf9a8d784","label":"security-advisories@github.com"},{"url":"https://github.com/open-webui/open-webui/pull/28790","label":"security-advisories@github.com"},{"url":"https://github.com/open-webui/open-webui/releases/tag/v0.11.1","label":"security-advisories@github.com"},{"url":"https://github.com/open-webui/open-webui/security/advisories/GHSA-v39v-59xw-j98g","label":"security-advisories@github.com"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-87012"},{"url":"https://github.com/open-webui/open-webui"}],"tags":["nvd","osv","pip","cve.org"],"epss":0.00279,"epssPercentile":0.20558,"aliases":["GHSA-v39v-59xw-j98g"],"ecosystem":"pip","ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-09-10T17:28:56.331947Z"},"ingestedAt":"2026-09-11T14:42:19.865Z","slug":"CVE-2026-87012","body":"## Overview\n\nOpen WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.9.0 until 0.11.1, backend/open_webui/models/calendar.py stored the calendar event meta.alert_minutes value without type validation and the shared upcoming-event scheduler compared that value numerically. An authenticated user with the calendar permission could store a non-numeric alert_minutes value that raised an exception and aborted the instance-wide alert pass, suppressing all users' reminders while the event remained in the lookahead window. This issue is fixed in version 0.11.1.\n\n## Affected\n\n- `open_webui >= 0.9.0, < 0.11.1`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `open_webui 0.11.1`\n\n## Package advisory (CVE-2026-87012)\n\nAffected packages:\n\n- `open-webui >= 0.9.0, < 0.11.1`\n\nPatched in:\n\n- `open-webui 0.11.1`\n\nSource: https://osv.dev/vulnerability/GHSA-v39v-59xw-j98g","depth":"sunlit","depthScore":24,"depthScoreParts":{"impact":23.7,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}