Medium severity4.8NVD Advisory· Published Aug 25, 2026· Updated Aug 31, 2026
CVE-2026-79670
CVE-2026-79670
Description
Ech0 before 4.4.3 contains a stored cross-site scripting vulnerability in the file upload endpoint that validates Content-Type using only client-supplied headers without server-side inspection. Attackers with admin privileges can upload SVG or HTML files containing JavaScript that executes in the application origin when accessed by any user, enabling session hijacking and data exfiltration.
AI Insight
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Affected products
1Patches
Vulnerability mechanics
References
2News mentions
1- Lin Snow Ech0: Fifteen Auth, SSRF, and XSS Flaws Disclosed TogetherVypr Intelligence · Aug 25, 2026