CVE-2026-70493 Details
Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.9.6 until 0.11.0, the built-in knowledge search path in backend/open_webui/tools/knowledge_fs.py and backend/open_webui/tools/builtin.py let a chat participant choose a pattern used to grep knowledge files. Patterns containing regex metacharacters were compiled with Python's backtracking re engine and run against every line of every reachable file with no time limit, so a crafted pattern such as (x|x)*y and one matching uploaded file line can pin one CPU core and block the event loop. This causes availability impact for every other user of the affected worker. This issue is fixed in 0.11.0.
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Exploit prediction scoring system (EPSS) score for CVE-2026-70493
EPSS (Exploit Prediction Scoring System): EPSS predicts the likelihood that a vulnerability will be exploited in the wild. A higher percentage means a greater chance of an exploit occurring. The EPSS model produces a probability score between 0 and 1 (0 and 100%).
0.59 Probability of exploitation activity being observed over the next 30 days (48th percentile)
CVSS score for CVE-2026-70493
CVSS (Common Vulnerability Scoring System): An open framework owned and managed by FIRST.Org, Inc. that assigns a numerical score from 0 to 10 to software vulnerabilities to indicate their severity.
6.5 Medium
Products affected by CVE-2026-70493
Open Webui 0.9.6
Open Webui 0.10.1
Open Webui 0.10.2
Open Webui 0.10.0
DVE Score by Bitsight AI
DVE scores complement traditional static scoring systems like CVSS with Bitsight AI powered real-time threat intelligence and underground cyber criminal activity so that security teams can reduce alert fatigue and focus on vulnerabilities most likely to be exploited.
Low
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CVE-2026-70493 Global Footprint

Top 10 Identified Countries

Country Observations Percentage
US 627 26.29%
DE 344 14.42%
CN 241 10.10%
KR 97 4.07%
SG 92 3.86%
GB 90 3.77%
RU 73 3.06%
FR 68 2.85%
JP 63 2.64%
IR 43 1.80%

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CVE-2026-70493 Industry Footprint

Top 10 Identified Industries

*Service provider organizations (typically Technology and Telecommunications) are disproportionally represented in the results given their upstream ownership of end-user infrastructure. See our FAQs.

Industry* Observations Percentage
Technology 1,381 83.39%
Telecommunications 205 12.38%
Education 39 2.36%
Government/Politics 6 0.36%
Retail 4 0.24%
Energy/Resources 4 0.24%
Manufacturing 3 0.18%
Engineering 3 0.18%
Media/Entertainment 3 0.18%
Consumer Goods 2 0.12%

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