{"cve":"CVE-2026-70489","nvd":{"published":"2026-08-04T21:16:37.763","modified":"2026-09-18T14:57:16.723","status":"Analyzed","description":"Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.9.0 until 0.11.0, automation recurrence parsing in backend/open_webui/utils/automations.py anchored minutely and hourly rules at a fixed date of 2000-01-01 and then walked forward one interval at a time to find the next run. A single FREQ=MINUTELY rule enumerates roughly a quarter-century of occurrences synchronously on the event loop that also serves scheduler, HTTP, and WebSocket traffic, and the scheduler recomputes the next run for every claimed row on each poll. This causes availability impact for every other user of the instance. This issue is fixed in 0.11.0.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","score":6.5},"cwes":["CWE-400","CWE-1333"],"references":["https://github.com/open-webui/open-webui/commit/c4ae8c86786fed521960466f6d8eef8af22c2946","https://github.com/open-webui/open-webui/releases/tag/v0.11.0","https://github.com/open-webui/open-webui/security/advisories/GHSA-73cq-mcgh-379c","https://github.com/open-webui/open-webui/security/advisories/GHSA-73cq-mcgh-379c"],"products":["openwebui:open_webui"],"source":"nvd","synced_at":"2026-10-19T22:47:10.050265369+00:00"},"epss":{"cve":"CVE-2026-70489","score":0.00573,"percentile":0.47355,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-73cq-mcgh-379c","url":"https://osv.dev/vulnerability/GHSA-73cq-mcgh-379c","summary":"Open WebUI: Instance-wide stall via automation recurrence rules that force multi-second parsing","modified":"2026-08-19T05:15:06.672240933Z","packages":[{"ecosystem":"PyPI","name":"open-webui","purl":"pkg:pypi/open-webui","ranges":[">=0.9.0 <0.11.0"],"fixed":["0.11.0"]}]},{"id":"PYSEC-2026-3644","url":"https://osv.dev/vulnerability/PYSEC-2026-3644","summary":"Open WebUI: Instance-wide stall via automation recurrence rules that force multi-second parsing","modified":"2026-08-10T11:30:10.286608676Z","packages":[{"ecosystem":"PyPI","name":"open-webui","purl":"pkg:pypi/open-webui","ranges":[">=0.9.0 <0.11.0"],"fixed":["0.11.0"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}