{"schemaVersion":3,"id":"CVE-2026-87012","aliases":["GHSA-v39v-59xw-j98g","PYSEC-2026-4126"],"status":"published","duplicateOf":null,"title":null,"description":"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 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.","dates":{"published":"2026-09-09T20:57:58.794Z","modified":"2026-09-10T17:48:20.357Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":4.3,"severity":"medium","version":"3.1","versionLabel":"v3.1","source":"CVE.org","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L","computed":false,"selection":"backend-summary"},"metrics":[{"version":"3.1","versionLabel":"v3.1","source":"CVE.org","score":4.3,"severity":"medium","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L","exploitability":null,"impact":null,"computed":false},{"version":"3.1","versionLabel":"v3.1","source":"OSV · Pypi","score":4.3,"severity":"medium","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L","exploitability":7.2,"impact":2.3,"computed":true},{"version":"3.1","versionLabel":"v3.1","source":"NVD","score":4.3,"severity":"medium","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":0.00484,"percentile":0.40703,"severity":"low","asOf":"2026-10-21T00:00:00.000Z","change":{"pp":0.20499999999999996,"baselineDate":"2026-09-21T00:00:00.000Z","baselineScore":0.00279},"history":[{"date":"2026-09-14T00:00:00.000Z","score":0.00268,"percentile":null},{"date":"2026-09-15T00:00:00.000Z","score":0.00268,"percentile":null},{"date":"2026-09-16T00:00:00.000Z","score":0.00279,"percentile":null},{"date":"2026-09-17T00:00:00.000Z","score":0.00279,"percentile":null},{"date":"2026-09-18T00:00:00.000Z","score":0.00279,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.00279,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.00279,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.00279,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00279,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00279,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00484,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00484,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00484,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00484,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00484,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00484,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00484,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00484,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00484,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00484,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00484,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00484,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00484,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00484,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00484,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00484,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00484,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00484,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00484,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00484,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00484,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00484,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00484,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00484,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00484,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00484,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.00484,"percentile":null},{"date":"2026-10-21T00:00:00.000Z","score":0.00484,"percentile":0.40703}],"last30":[{"date":"2026-09-21T00:00:00.000Z","score":0.00279,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00279,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00279,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00484,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00484,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00484,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00484,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00484,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00484,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00484,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00484,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00484,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00484,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00484,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00484,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00484,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00484,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00484,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00484,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00484,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00484,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00484,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00484,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00484,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00484,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00484,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00484,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00484,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00484,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.00484,"percentile":null},{"date":"2026-10-21T00:00:00.000Z","score":0.00484,"percentile":0.40703}]},"kev":{"state":"not-listed","entries":[],"listedCount":0,"totalCatalogs":3,"catalogs":[{"source":"cisa","label":"CISA","listed":false,"entry":null},{"source":"enisa","label":"ENISA","listed":false,"entry":null},{"source":"circl","label":"CIRCL","listed":false,"entry":null}]},"ransomware":{"state":"none-recorded","sources":[]},"exploits":[{"id":"GITHUB_OPEN-WEBUI_OPEN-WEBUI","name":"Open Webui","source":"github","url":"https://github.com/open-webui/open-webui/security/advisories/GHSA-8gh5-qqh8-hq3x","maturity":"poc","reliabilityScore":0.3,"verified":false,"type":null,"platforms":[],"requiresAuth":null,"exploitdb":null,"metasploit":null}],"exploitCount":1,"weaknesses":[{"id":"CWE-754","name":"Improper Check for Unusual or Exceptional Conditions","description":"The product does not check or incorrectly checks for unusual or exceptional conditions that are not expected to occur frequently during day to day operation of the product.","type":"weakness","status":"Incomplete","abstraction":"Class","likelihoodOfExploit":"Medium","url":"https://cwe.mitre.org/data/definitions/754.html"},{"id":"CWE-1287","name":"Improper Validation of Specified Type of Input","description":"The product receives input that is expected to be of a certain type, but it does not validate or incorrectly validates that the input is actually of the expected type.","type":"weakness","status":"Incomplete","abstraction":"Base","likelihoodOfExploit":null,"url":"https://cwe.mitre.org/data/definitions/1287.html"}],"affected":[{"vendor":"open-webui","product":"open-webui","name":"open-webui","label":"open-webui","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"≥ 0.9.0, < 0.11.1","noFixRecorded":false,"fixedIn":null}],"versionsText":"≥ 0.9.0, < 0.11.1","eol":null,"hubHref":"/vendor/open-webui/open-webui"},{"vendor":"openwebui","product":"open_webui","name":"open webui","label":"open_webui","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"≥ 0.9.0, < 0.11.1","noFixRecorded":false,"fixedIn":null}],"versionsText":"≥ 0.9.0, < 0.11.1","eol":null,"hubHref":"/vendor/openwebui/open_webui"},{"vendor":"PyPI","product":"open-webui","name":"open-webui","label":"open-webui","ecosystem":"PyPI","cpePart":null,"purl":"pkg:pypi/open-webui","purlType":"pypi","versions":[{"text":"≥ 0.9.0, < 0.11.1","noFixRecorded":false,"fixedIn":null}],"versionsText":"≥ 0.9.0, < 0.11.1","eol":null,"hubHref":null}],"affectedCount":3,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://github.com/open-webui/open-webui/security/advisories/GHSA-v39v-59xw-j98g","label":"github.com/open-webui/open-webui/security/advisories/GHSA-v39v-59xw-j98g","hostname":"github.com","tags":["X Refsource CONFIRM","WEB","Exploit","Vendor Advisory"]},{"url":"https://github.com/open-webui/open-webui/pull/28790","label":"github.com/open-webui/open-webui/pull/28790","hostname":"github.com","tags":["X Refsource MISC","WEB","Issue Tracking","Patch"]},{"url":"https://github.com/open-webui/open-webui/commit/abc69000b33b4894fbd97fc2c962139cf9a8d784","label":"github.com/open-webui/open-webui/commit/abc69000b33b4894fbd97fc2c962139cf9a8d784","hostname":"github.com","tags":["X Refsource MISC","WEB","Patch"]},{"url":"https://github.com/open-webui/open-webui/releases/tag/v0.11.1","label":"github.com/open-webui/open-webui/releases/tag/v0.11.1","hostname":"github.com","tags":["X Refsource MISC","WEB","Release Notes"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-87012","label":"nvd.nist.gov/vuln/detail/CVE-2026-87012","hostname":"nvd.nist.gov","tags":["Advisory"]},{"url":"https://github.com/open-webui/open-webui","label":"github.com/open-webui/open-webui","hostname":"github.com","tags":["PACKAGE"]},{"url":"https://pypi.org/project/open-webui","label":"pypi.org/project/open-webui","hostname":"pypi.org","tags":["PACKAGE"]},{"url":"https://github.com/advisories/GHSA-v39v-59xw-j98g","label":"github.com/advisories/GHSA-v39v-59xw-j98g","hostname":"github.com","tags":["Advisory"]}],"lineage":{"upstream":[],"downstream":[],"duplicates":[],"related":[]},"timeline":[{"kind":"published","date":"2026-09-09T20:57:58.794Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-09-10T17:48:20.357Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":27,"level":"medium","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-22T09:58:12.242Z","stale":false,"partial":false}}