CVE-2026-109295: Open WebUI Regular Expression Denial of Service Vulnerability
Open WebUI
Open WebUI is affected by a regular expression denial of service flaw via file search patterns. Attackers can stall server workers by executing catastrophically backtracking regex calls.
disclosed CVENo confirmed exploitation, so this record is tracked as a disclosed vulnerability and not counted as an incident. It moves into the counts if CISA or the vendor confirms exploitation. Why
- CVSS
- 7.1
- EPSS
- <0.01 · top 74% · 2026-11-13
- fix status
- Fix status unknown
- first report
- 12 Oct 2026
- last update
- 12 Oct 2026
- CVE ids
Timeline · 1
Sources · 1
Advisories and databases
- 2026-10-12CVE-2026-109295: Open WebUI from 0.11.0 before 0.11.4 contains a regular expression denial of service vulnerability that allows authenticated…NVD · nvd.nist.gov/vuln/detail/CVE-2026-109295
Titles and links belong to their publishers. The summary above is written by gcdRadar in its own words; data is CC BY-SA 4.0.
Classification
- lane
- Patch now
- AI role
- Attack on AI
- categories
- Infrastructure vulnerability
- severity
- 2 · Disclosed vulnerability
- fix status
- Fix status unknown
- targets
- Framework / tooling
- owasp llm top 10
- LLM03:2025 Supply Chain
- mitre atlas
- no technique for these categories
- tags
- dosopen-webui
- dates
- happened 12 Oct 2026 · first reported 12 Oct 2026
- origin
- NVDVulnerability record from NVD / the GitHub Advisory Database. This product uses the NVD API but is not endorsed or certified by the NVD.
- record
- confidence 0.95 · created 2026-10-18 06:33Z · updated 2026-10-18 06:33Z
Lane, AI role, categories and severity come from the classifier; the OWASP and ATLAS rows are derived from the categories. How these are assigned
Copy a brief
This record as a short Markdown brief, for a ticket, a chat or a coding agent.
the brief as text
# CVE-2026-109295: Open WebUI Regular Expression Denial of Service Vulnerability https://gcdradar.vercel.app/incidents/cve-2026-109295-open-webui-regular-expression-denial-of-serv · AIR-2026-0310 · closed 2026-10-12 - Lane: Patch now - Severity: 2 (Disclosed vulnerability) - Fix status: Fix status unknown - First reported: 2026-10-12 - AI role: Attack on AI - Products: Open WebUI - CVE ids: CVE-2026-109295 - CVSS: 7.1 ## Summary Open WebUI is affected by a regular expression denial of service flaw via file search patterns. Attackers can stall server workers by executing catastrophically backtracking regex calls. ## What to do No action recorded; read the sources below and the vendor's advisory. ## Latest updates - 2026-10-12: CVE-2026-109295: Open WebUI from 0.11.0 before 0.11.4 contains a regular expression denial of service vulnerability that allows authenticated… (https://nvd.nist.gov/vuln/detail/CVE-2026-109295) ## Sources - 2026-10-12 NVD: CVE-2026-109295: Open WebUI from 0.11.0 before 0.11.4 contains a regular expression denial of service vulnerability that allows authenticated… https://nvd.nist.gov/vuln/detail/CVE-2026-109295 Verify against the vendor's advisory before changing production. Data CC BY-SA 4.0, https://gcdradar.vercel.app.
Related
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Patch now · Disclosed · since 12 Oct 2026 · CVE-2026-109288
AI - closed7.1Open WebUI CVE-2026-109293: Open WebUI Tool Source Code Information Disclosure
Patch now · Disclosed · since 12 Oct 2026 · CVE-2026-109293
AI - closed8.5Open WebUI CVE-2026-109291: Open WebUI Cross-Site Scripting via Citation URLs
Patch now · Disclosed · since 12 Oct 2026 · CVE-2026-109291
AI - closed7.1Open WebUI CVE-2026-109299: Open WebUI Denial of Service via Recurrence Rules
Patch now · Disclosed · since 12 Oct 2026 · CVE-2026-109299
AI - closed8.4Open WebUI CVE-2026-109290: Open WebUI Stored XSS Vulnerability in DocxPreview
Patch now · Disclosed · since 12 Oct 2026 · CVE-2026-109290
AI - closed7.1Open WebUI CVE-2026-109298: Open WebUI vulnerable to regex denial of service in search tools
Patch now · Disclosed · since 12 Oct 2026 · CVE-2026-109298
AI