Reference page — cumulative record through Sunday, October 4, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.
CVE-2026-70489
open-webui open-webui — Open WebUI: Instance-wide stall via automation recurrence rules that force multi-second parsing
AV AC PR UI S C I A CVSS EPSS %ile KEV
N L L N U N N H 6.5 .0057 45.4 —
AFFECTED
Product Versions Fixed
open-webui >= 0.9.0, < 0.11.0 – —
TIMELINE
Aug 4 Reserved by GitHub_M
Aug 4 Published (CNA: GitHub_M)
Sep 18 EXPLOIT PUBLISHED — CVE-2026-70489 (open-webui). Public exploit reference added.
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.
Lifecycle
Complete event history — 3 events, chronological
| Date | Event | Detail |
|---|
| August 4, 2026 | Reserved | Reserved by GitHub_M |
| August 4, 2026 | Published | Published (CNA: GitHub_M) |
| September 18, 2026 | EXPLOIT PUBLISHED | EXPLOIT PUBLISHED — CVE-2026-70489 (open-webui). Public exploit reference added. |
Affected
Affected products and packages — 1 row
| Vendor | Product / Package | Ecosystem | Version introduced | Fixed |
|---|
| open-webui | open-webui | — | >= 0.9.0, < 0.11.0 | — |
About this page
This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-70489 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Sunday, October 4, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.
