CVE-2026-79665 Ech0 before 4.5.1 Authorization Bypass via Session Tokens
Logged-in non-admin users can bypass scope validation to access admin endpoints, reading system logs and user data.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-79665?
CVE-2026-79665 is a high-severity missing authorization vulnerability in lin-snow Ech0, published on 25 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Ech0 before 4.5.1 contains an authorization bypass vulnerability where session tokens skip scope validation in RequireScopes middleware, allowing logged-in non-admin users to access admin endpoints. Attackers can read system logs, visitor statistics, user emails, and subscribe to live WebSocket logs by sending authenticated session tokens to unprotected endpoints.
Weakness: CWE-862
Which versions are affected by CVE-2026-79665?
How do I fix CVE-2026-79665?
No fix has been published for CVE-2026-79665 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-79665 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-79665 exists.
Sources
Also known as GHSA-hmmq-qh6g-6wgh, GHSA-q8hh-m6v5-4f3x.