CVE-2026-79666 Ech0 before 4.4.3 Missing Authorization via dashboard log endpoints

Ech0 before 4.4.3 fails to enforce administrator authorization on dashboard log endpoints, allowing any authenticated user to access system logs. Attackers with valid user sessions can query GET /api/system/logs and subscribe to SSE and WebSocket log streams to retrieve sensitive operational data...

CVE-2026-79665

Ech0 before 4.5.1 is affected by an authorization bypass vulnerability. The root cause is that session tokens skip scope validation in the RequireScopes middleware , enabling logged-in non-admin users to access admin endpoints. An attacker with a valid low-privilege session token can read system ...

CVE-2026-79666 Ech0 before 4.4.3 Missing Authorization via dashboard log endpoints

Ech0 before 4.4.3 fails to enforce administrator authorization on dashboard log endpoints, allowing any authenticated user to access system logs. Attackers with valid user sessions can query GET /api/system/logs and subscribe to SSE and WebSocket log streams to retrieve sensitive operational data...

CVE-2026-79664

Ech0 versions before 4.7.3 contain an access token revocation bypass. When tokens are created with the never-expire option, three independent revocation mechanisms all fail: the logout handler panics on a nil ExpiresAt field, RevokeToken skips when remainTTL is zero, and the admin delete action d...

CVE-2026-79664 Ech0 before 4.7.3 Access Token Revocation Bypass

Ech0 before 4.7.3 fails to properly revoke access tokens created with never-expire option, allowing attackers to maintain perpetual authenticated access after token theft. Three independent revocation mechanisms fail: logout panics on nil ExpiresAt field, RevokeToken skips when remainTTL is zero,...

EUVD-2026-65450

Ech0 before 4.7.3 fails to properly revoke access tokens created with never-expire option, allowing attackers to maintain perpetual authenticated access after token theft. Three independent revocation mechanisms fail: logout panics on nil ExpiresAt field, RevokeToken skips when remainTTL is zero,...

CVE-2026-79664 Ech0 before 4.7.3 Access Token Revocation Bypass

Ech0 before 4.7.3 fails to properly revoke access tokens created with never-expire option, allowing attackers to maintain perpetual authenticated access after token theft. Three independent revocation mechanisms fail: logout panics on nil ExpiresAt field, RevokeToken skips when remainTTL is zero,...

CVE-2026-79664 Ech0 before 4.7.3 Access Token Revocation Bypass

Ech0 before 4.7.3 fails to properly revoke access tokens created with never-expire option, allowing attackers to maintain perpetual authenticated access after token theft. Three independent revocation mechanisms fail: logout panics on nil ExpiresAt field, RevokeToken skips when remainTTL is zero,...

EUVD-2026-65452

Ech0 through 4.5.6 contains an OAuth redirect URI validation vulnerability in parseAndValidateClientRedirect internal/service/auth/auth.go that compares only the scheme and host of the client-supplied redirecturi against the admin-configured allowlist, ignoring path, query, and fragment component...

CVE-2026-79663 Ech0 before 4.7.3 Stored XSS via RSS feed tag names

Ech0 before 4.7.3 contains a stored cross-site scripting vulnerability in the public RSS feed where tag names and markdown content are rendered without HTML escaping. Attackers with admin privileges can inject malicious tag names or raw HTML in echo content that executes as JavaScript in RSS...

CVE-2026-79662

Ech0 through 4.5.6 contains an OAuth redirect URI validation bypass in parseAndValidateClientRedirect (internal/service/auth/auth.go). The function compares only the scheme and host of the client-supplied redirect_uri against the admin-configured allowlist, ignoring path, query, and fragment comp...

CVE-2026-79662 Ech0 before 4.7.3 OAuth Redirect URI Validation Bypass

Ech0 through 4.5.6 contains an OAuth redirect URI validation vulnerability in parseAndValidateClientRedirect internal/service/auth/auth.go that compares only the scheme and host of the client-supplied redirecturi against the admin-configured allowlist, ignoring path, query, and fragment component...

EUVD-2026-65451

Ech0 before 4.7.3 contains a stored cross-site scripting vulnerability in the public RSS feed where tag names and markdown content are rendered without HTML escaping. Attackers with admin privileges can inject malicious tag names or raw HTML in echo content that executes as JavaScript in RSS...

CVE-2026-79663

Ech0 before 4.7.3 is affected by a stored cross-site scripting vulnerability in its public RSS feed . Tag names and Markdown content are rendered without HTML escaping, allowing an attacker with admin privileges to inject malicious tag names or raw HTML into echo content. The injected script exec...

CVE-2026-79663 Ech0 before 4.7.3 Stored XSS via RSS feed tag names

Ech0 before 4.7.3 contains a stored cross-site scripting vulnerability in the public RSS feed where tag names and markdown content are rendered without HTML escaping. Attackers with admin privileges can inject malicious tag names or raw HTML in echo content that executes as JavaScript in RSS...

CVE-2026-79662 Ech0 before 4.7.3 OAuth Redirect URI Validation Bypass

Ech0 through 4.5.6 contains an OAuth redirect URI validation vulnerability in parseAndValidateClientRedirect internal/service/auth/auth.go that compares only the scheme and host of the client-supplied redirecturi against the admin-configured allowlist, ignoring path, query, and fragment component...

CVE-2026-79663 Ech0 before 4.7.3 Stored XSS via RSS feed tag names

Ech0 before 4.7.3 contains a stored cross-site scripting vulnerability in the public RSS feed where tag names and markdown content are rendered without HTML escaping. Attackers with admin privileges can inject malicious tag names or raw HTML in echo content that executes as JavaScript in RSS...

CVE-2026-79662 Ech0 before 4.7.3 OAuth Redirect URI Validation Bypass

Ech0 through 4.5.6 contains an OAuth redirect URI validation vulnerability in parseAndValidateClientRedirect internal/service/auth/auth.go that compares only the scheme and host of the client-supplied redirecturi against the admin-configured allowlist, ignoring path, query, and fragment component...

EUVD-2026-65453

Ech0 through 4.5.6 registers the PUT /api/echo/like/:id endpoint on the public router group without authentication or rate limiting. Unauthenticated attackers can increment the favcount counter of any echo including private echoes by supplying its UUID, which can be harvested from the public GET...

CVE-2026-79661 Ech0 before 4.7.3 Unauthenticated fav_count Modification

Ech0 through 4.5.6 registers the PUT /api/echo/like/:id endpoint on the public router group without authentication or rate limiting. Unauthenticated attackers can increment the favcount counter of any echo including private echoes by supplying its UUID, which can be harvested from the public GET...