Open WebUI CORS misconfiguration and session validation issue
Open WebUI
Open WebUI was found to contain CORS misconfigurations and session validation vulnerabilities. The issues were reported by the GitHub Security Lab for coordination and resolution.
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
- fix status
- Fix status unknown
- first report
- 11 May 2026
- last update
- 11 May 2026
Timeline · 1
Sources · 1
Advisories and databases
- 2026-05-11GHSA-6xcp-7mpr-m7wm: Open WebUI has a CORS misconfiguration and session validation issueGitHub Advisory Database · github.com/advisories/GHSA-6xcp-7mpr-m7wm
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
- dates
- happened 11 May 2026 · first reported 11 May 2026
- origin
- GitHub Advisory DatabaseVulnerability 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 07:00Z · updated 2026-10-18 10:14Z
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
# Open WebUI CORS misconfiguration and session validation issue https://gcdradar.vercel.app/incidents/ghsa-6xcp-7mpr-m7wm-open-webui-cors-misconfiguration-and-ses · AIR-2026-0646 · closed 2026-05-11 - Lane: Patch now - Severity: 2 (Disclosed vulnerability) - Fix status: Fix status unknown - First reported: 2026-05-11 - AI role: Attack on AI - Products: Open WebUI ## Summary Open WebUI was found to contain CORS misconfigurations and session validation vulnerabilities. The issues were reported by the GitHub Security Lab for coordination and resolution. ## What to do No action recorded; read the sources below and the vendor's advisory. ## Latest updates - 2026-05-11: GHSA-6xcp-7mpr-m7wm: Open WebUI has a CORS misconfiguration and session validation issue (https://github.com/advisories/GHSA-6xcp-7mpr-m7wm) ## Sources - 2026-05-11 GitHub Advisory Database: GHSA-6xcp-7mpr-m7wm: Open WebUI has a CORS misconfiguration and session validation issue https://github.com/advisories/GHSA-6xcp-7mpr-m7wm Verify against the vendor's advisory before changing production. Data CC BY-SA 4.0, https://gcdradar.vercel.app.
Related
- closed5.1Open WebUI CVE-2026-45346: Cross-Site Scripting in Open WebUI SVG Renderer
Patch now · Disclosed · since 15 May 2026 · CVE-2026-45346
AI - closed8.1Open WebUI CVE-2026-45665: Stored XSS in Open WebUI Banner Component
Patch now · Disclosed · since 15 May 2026 · CVE-2026-45665
AI - closed7.2Open WebUI CVE-2026-45395: Permission Bypass in Open WebUI Tool Update Endpoint
Patch now · Disclosed · since 15 May 2026 · CVE-2026-45395
AI - closed4.6Open WebUI CVE-2026-45317: CSRF Vulnerability in Open WebUI Image Uploads
Patch now · Disclosed · since 15 May 2026 · CVE-2026-45317
AI - closed6.5Open WebUI CVE-2026-45339: API Key Restriction Bypass in Open WebUI
Patch now · Disclosed · Patched · since 15 May 2026 · updated 15 May 2026 · CVE-2026-45339
AI - closed8.5Open WebUI CVE-2026-45400: Open WebUI SSRF Bypass in validate_url
Patch now · Disclosed · since 14 May 2026 · updated 15 May 2026 · CVE-2026-45400
AI