# Open WebUI vulnerabilities Source: https://junglewise.ai/threats/technologies/open-webui-open-webui Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats Updated: 12 November 2026, 03:07 UTC. Rebuilt every hour. Data: https://junglewise.ai/threats/technologies/open-webui-open-webui.json License: CC BY 4.0 with a link back Junglewise Threat Intelligence has tracked 18 vulnerabilities in Open WebUI: 0 in the last 7 days and 17 in the last 90 days, 0 of them critical and 0 exploited in the wild. The most recent, CVE-2026-109300, was published on 12 October 2026. 17 vulnerabilities in the last four weeks, up from none in the four before. ## Counts - Last 7 days: 0 - Last 30 days: 0 - Last 90 days: 17 - All time: 18 (0 critical, 0 exploited in the wild) ## About Open WebUI Web interface for interacting with large language models and AI assistants. ## Latest Open WebUI vulnerabilities - [CVE-2026-109300: Open WebUI stored cross-site scripting in Markdown renderer](https://junglewise.ai/threats/cve-2026-109300-open-webui-from-0-6-31-before-0-11-4-contains-a-stored-cross) (medium, CVSS 4.6, published 12 Oct 2026) - [CVE-2026-109299: Open WebUI denial of service in recurrence rule validation](https://junglewise.ai/threats/cve-2026-109299-open-webui-from-0-9-0-before-0-11-4-contains-a-denial-of-service) (medium, CVSS 6.5, published 12 Oct 2026) - [CVE-2026-109298: Open WebUI regex denial of service in file search tools](https://junglewise.ai/threats/cve-2026-109298-open-webui-0-11-0-before-0-11-4-compiles-user-chosen-grep) (medium, CVSS 6.5, published 12 Oct 2026) - [CVE-2026-109297: Open WebUI automation recurrence-rule denial of service](https://junglewise.ai/threats/cve-2026-109297-open-webui-0-11-0-before-0-11-4-contains-a-denial-of-service) (medium, CVSS 6.5, published 12 Oct 2026) - [CVE-2026-109296: Open WebUI missing authorization in model provider routes](https://junglewise.ai/threats/cve-2026-109296-open-webui-before-0-11-4-contains-a-missing-authorization) (medium, CVSS 4.3, published 12 Oct 2026) - [CVE-2026-109295: Open WebUI regular expression denial of service in file search](https://junglewise.ai/threats/cve-2026-109295-open-webui-from-0-11-0-before-0-11-4-contains-a-regular) (medium, CVSS 6.5, published 12 Oct 2026) - [CVE-2026-109294: Open WebUI memory exhaustion via compressed remote image](https://junglewise.ai/threats/cve-2026-109294-open-webui-from-0-6-42-before-0-11-4-contains-an-uncontrolled) (medium, CVSS 6.5, published 12 Oct 2026) - [CVE-2026-109293: Open WebUI tool source code disclosure via export endpoint](https://junglewise.ai/threats/cve-2026-109293-open-webui-from-0-11-0-before-0-11-4-contains-an-information) (medium, CVSS 6.5, published 12 Oct 2026) - [CVE-2026-109292: Open WebUI session cookie leakage in OAuth mode](https://junglewise.ai/threats/cve-2026-109292-open-webui-from-0-6-27-before-0-11-4-contains-an-information) (medium, CVSS 6.8, published 12 Oct 2026) - [CVE-2026-109291: Open WebUI stored cross-site scripting in citation embed_url](https://junglewise.ai/threats/cve-2026-109291-open-webui-from-0-6-33-before-0-11-4-contains-a-cross-site) (high, CVSS 7.3, published 12 Oct 2026) - [CVE-2026-109290: Open WebUI stored cross-site scripting in DOCX preview](https://junglewise.ai/threats/cve-2026-109290-open-webui-from-0-11-1-before-0-11-4-contains-a-stored-cross) (high, CVSS 7.3, published 12 Oct 2026) - [CVE-2026-109289: Open WebUI improper session revocation in terminal WebSocket](https://junglewise.ai/threats/cve-2026-109289-open-webui-from-0-8-8-before-0-11-4-contains-an-improper) (medium, CVSS 6.3, published 12 Oct 2026) - [CVE-2026-109288: Open WebUI stored cross-site scripting in markdown link rendering](https://junglewise.ai/threats/cve-2026-109288-open-webui-before-0-11-4-contains-a-stored-cross-site-scripting) (medium, CVSS 6.4, published 12 Oct 2026) - [CVE-2026-109287: Open WebUI authorization flaw in knowledge base file listing](https://junglewise.ai/threats/cve-2026-109287-open-webui-from-0-9-6-before-0-11-4-contains-an-authorization) (medium, CVSS 4.3, published 12 Oct 2026) - [CVE-2026-109285: Open WebUI improper access control in knowledge base file handling](https://junglewise.ai/threats/cve-2026-109285-open-webui-from-0-6-0-before-0-11-4-contains-an-improper-access) (medium, CVSS 5, published 12 Oct 2026) - [CVE-2026-109284: Open WebUI improper authorization in chat fork handler](https://junglewise.ai/threats/cve-2026-109284-open-webui-from-0-11-0-before-0-11-4-contains-an-improper) (medium, CVSS 4.3, published 12 Oct 2026) - [CVE-2026-109283: Open WebUI authorization bypass in OAuth token exchange](https://junglewise.ai/threats/cve-2026-109283-open-webui-from-0-11-1-before-0-11-4-contains-an-authorization) (medium, CVSS 5.4, published 12 Oct 2026) - [CVE-2025-65959: Open WebUI stored DOM XSS in Note PDF download](https://junglewise.ai/threats/cve-2025-65959-open-webui-stored-dom-xss-in-note-pdf-download) (high, CVSS 8.7, published 4 Dec 2025) ## Most severe Open WebUI vulnerabilities - [CVE-2025-65959: Open WebUI stored DOM XSS in Note PDF download](https://junglewise.ai/threats/cve-2025-65959-open-webui-stored-dom-xss-in-note-pdf-download) (high, CVSS 8.7, published 4 Dec 2025) - [CVE-2026-109291: Open WebUI stored cross-site scripting in citation embed_url](https://junglewise.ai/threats/cve-2026-109291-open-webui-from-0-6-33-before-0-11-4-contains-a-cross-site) (high, CVSS 7.3, published 12 Oct 2026) - [CVE-2026-109290: Open WebUI stored cross-site scripting in DOCX preview](https://junglewise.ai/threats/cve-2026-109290-open-webui-from-0-11-1-before-0-11-4-contains-a-stored-cross) (high, CVSS 7.3, published 12 Oct 2026) - [CVE-2026-109292: Open WebUI session cookie leakage in OAuth mode](https://junglewise.ai/threats/cve-2026-109292-open-webui-from-0-6-27-before-0-11-4-contains-an-information) (medium, CVSS 6.8, published 12 Oct 2026) - [CVE-2026-109298: Open WebUI regex denial of service in file search tools](https://junglewise.ai/threats/cve-2026-109298-open-webui-0-11-0-before-0-11-4-compiles-user-chosen-grep) (medium, CVSS 6.5, published 12 Oct 2026) - [CVE-2026-109299: Open WebUI denial of service in recurrence rule validation](https://junglewise.ai/threats/cve-2026-109299-open-webui-from-0-9-0-before-0-11-4-contains-a-denial-of-service) (medium, CVSS 6.5, published 12 Oct 2026) - [CVE-2026-109297: Open WebUI automation recurrence-rule denial of service](https://junglewise.ai/threats/cve-2026-109297-open-webui-0-11-0-before-0-11-4-contains-a-denial-of-service) (medium, CVSS 6.5, published 12 Oct 2026) - [CVE-2026-109295: Open WebUI regular expression denial of service in file search](https://junglewise.ai/threats/cve-2026-109295-open-webui-from-0-11-0-before-0-11-4-contains-a-regular) (medium, CVSS 6.5, published 12 Oct 2026) - [CVE-2026-109294: Open WebUI memory exhaustion via compressed remote image](https://junglewise.ai/threats/cve-2026-109294-open-webui-from-0-6-42-before-0-11-4-contains-an-uncontrolled) (medium, CVSS 6.5, published 12 Oct 2026) - [CVE-2026-109293: Open WebUI tool source code disclosure via export endpoint](https://junglewise.ai/threats/cve-2026-109293-open-webui-from-0-11-0-before-0-11-4-contains-an-information) (medium, CVSS 6.5, published 12 Oct 2026) ## Vulnerabilities per week 17 vulnerabilities in the last four weeks, up from none in the four before. | Week of | Vulns | Critical | Exploited | | --- | --- | --- | --- | | 17 Aug 2026 | 0 | 0 | 0 | | 24 Aug 2026 | 0 | 0 | 0 | | 31 Aug 2026 | 0 | 0 | 0 | | 7 Sep 2026 | 0 | 0 | 0 | | 14 Sep 2026 | 0 | 0 | 0 | | 21 Sep 2026 | 0 | 0 | 0 | | 28 Sep 2026 | 0 | 0 | 0 | | 5 Oct 2026 | 0 | 0 | 0 | | 12 Oct 2026 | 17 | 0 | 0 | | 19 Oct 2026 | 0 | 0 | 0 | | 26 Oct 2026 | 0 | 0 | 0 | | 2 Nov 2026 | 0 | 0 | 0 | | 9 Nov 2026 | 0 | 0 | 0 | ## Sources NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories. Rebuilt every hour. Cite as: Junglewise Threat Intelligence, "Open WebUI vulnerabilities", https://junglewise.ai/threats/technologies/open-webui-open-webui, 12 November 2026.