CVE-2026-70489Open WebUI: Instance-wide stall via automation recurrence rules that force multi-second parsing
Updated under an hour ago ()
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It affects open-webui and 1 other product. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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
- 6.5 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- Weakness (CWE)
- CWE-400, CWE-1333
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- GitHub_M
- NVD analysis
- Analyzed
- Record last updated
- Aug 5, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
open-webui open-webui open_webui:open_webui (from the name) | from 0.9.0, < 0.11.0 | CNA record |
openwebui open_webui openwebui:open_webui | from 0.9.0 before 0.11.0 | NVD |
References
- https://github.com/open-webui/open-webui/security/advisories/GHSA-73cq-mcgh-379cx-refsource-confirm, exploit, vendor-advisory
- https://github.com/open-webui/open-webui/commit/c4ae8c86786fed521960466f6d8eef8af22c2946x-refsource-misc, patch
- https://github.com/open-webui/open-webui/releases/tag/v0.11.0x-refsource-misc, release-notes
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.