Open WebUI vulnerable to stored XSS via OAuth picture claim
Open WebUI
Open WebUI improperly validates OAuth picture claims during user login, storing SVG data URIs that lead to stored cross-site scripting. A vendor advisory addresses the flaw.
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
- 14 May 2026
- last update
- 14 May 2026
Timeline · 1
Sources · 1
Advisories and databases
- 2026-05-14GHSA-3wgj-c2hg-vm6q: Open WebUI vulnerable to stored XSS via OAuth picture claim stored as SVG data URI in profile_image_urlGitHub Advisory Database · github.com/advisories/GHSA-3wgj-c2hg-vm6q
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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 14 May 2026 · first reported 14 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 07:00Z
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 vulnerable to stored XSS via OAuth picture claim https://gcdradar.vercel.app/incidents/open-webui-vulnerable-to-stored-xss-via-oauth-picture-claim · AIR-2026-0679 · closed 2026-05-14 - Lane: Patch now - Severity: 2 (Disclosed vulnerability) - Fix status: Fix status unknown - First reported: 2026-05-14 - AI role: Attack on AI - Products: Open WebUI ## Summary Open WebUI improperly validates OAuth picture claims during user login, storing SVG data URIs that lead to stored cross-site scripting. A vendor advisory addresses the flaw. ## What to do No action recorded; read the sources below and the vendor's advisory. ## Latest updates - 2026-05-14: GHSA-3wgj-c2hg-vm6q: Open WebUI vulnerable to stored XSS via OAuth picture claim stored as SVG data URI in profile_image_url (https://github.com/advisories/GHSA-3wgj-c2hg-vm6q) ## Sources - 2026-05-14 GitHub Advisory Database: GHSA-3wgj-c2hg-vm6q: Open WebUI vulnerable to stored XSS via OAuth picture claim stored as SVG data URI in profile_image_url https://github.com/advisories/GHSA-3wgj-c2hg-vm6q Verify against the vendor's advisory before changing production. Data CC BY-SA 4.0, https://gcdradar.vercel.app.
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AI - closed6.5Open WebUI CVE-2026-45339: API Key Restriction Bypass in Open WebUI
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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