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  4. CVE 2026 70489 open webui instance wide stall via automation
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Back to active CVEs
Medium · CVSS 6.5CVE-2026-70489GHSA-73CQ-MCGH-379C

Open WebUI: Instance-wide stall via automation recurrence rules that force multi-second parsingCVE-2026-70489

Answer in brief

CVE-2026-70489 records a Medium severity (CVSS 6.5) vulnerability in Open WebUI: Instance-wide stall via automation recurrence rules that force multi-second parsing. The current sources do not mark it as known exploited. The current feed maps open-webui/open-webui (generic), open-webui (pip), open-webui (pypi). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Aug 4, 2026Updated Sep 18, 2026Source checked Nov 3, 2026First seen by HOL Aug 4, 2026Material review Sep 18, 2026
Upstream Advisory

Record context

Vulnerability class
Vulnerability
EPSS
Not reported
CWE IDs
CWE-400, CWE-1333
Source
CVE List V5
Source checked
Nov 3, 2026
References
7 linked sources
Open source record

Key facts

Risk
Medium · CVSS 6.5
Exploitation
Not marked as known exploited
Affected software
4 mapped packages or products
Fix availability
Available

Why this deserves its current priority

CVSS is 6.5. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps open-webui/open-webui (generic), open-webui (pip), open-webui (pypi). Check affected ranges and fixed versions before updating.

Affected products and reported versions
ProductAffected versionsFixed versions
cpe:2.3:a:openwebui:open_webui:*:*:*:*:*:*:*:*Not reportedNot reported
Mapped affected packages and fixed versions
PackageAffected rangeFixed version
open-webui/open-webuigeneric>=0.9.0 <0.11.00.11.0
open-webuipip>=0.9.0,<0.11.00.11.0
open-webuipypi>=0.9.0 <0.11.00.11.0

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for open-webui/open-webui, open-webui, open-webui.
  2. 2Review the reported fix. Update open-webui/open-webui to 0.11.0; open-webui to 0.11.0; open-webui to 0.11.0 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Aug 4, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Sep 18, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Aug 4, 2026

Sources and claim methodology

  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • Source referencepypi.org
  • NVD vulnerability recordnvd.nist.gov
Upstream source 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.

Quoted source text, attributed separately from HOL analysis.