CVE-2026-79667: high-severity vulnerability in lin-snow Ech0
Ech0 before 4.4.3 Authentication Bypass via Scope Enforcement
Published
21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 7.2epss 0.3%
exploitation probability
0.3%top 75% of all CVEs
observed exploitation
nono source reports it
Ech0 version 4.3.4 and earlier fails to reliably enforce scoped access token (least-privilege) restrictions on several privileged admin routes. Multiple privileged endpoints (e.g., /api/inbox, /api/panel/comments, /api/backup/export) omit scope checks and authorize based only on the user's admin role, and the backup export handler discards token scope metadata entirely. An attacker holding a deliberately limited (low-scope) admin access token can reach broader privileged functionality than intended, including reading the inbox and exporting a full database backup ZIP archive. Fixed in 4.4.3.
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:L/VA:L/SC:N/SI:N/SA:N
Affected products
lin-snow · Ech0Related CVEs — lin-snow Ech0
In the same product, most dangerous first.
CVE-2026-35037HIGHEch0 affected by unauthenticated SSRF in GetWebsiteTitle allows access to internal services and cloud metadataEPSS 0.6%CVE-2026-79665HIGHEch0 before 4.5.1 Authorization Bypass via Session TokensEPSS 0.5%CVE-2026-79658HIGHEch0 before 5.0.1 Denial of Service via Accept-LanguageEPSS 0.5%CVE-2026-33638MEDIUMEch0 authenticated user-list exposed data via public `/api/allusers` endpointEPSS 0.5%CVE-2026-79668MEDIUMEch0 before 4.7.3 Unauthenticated Like Endpoint Metric InflationEPSS 0.4%CVE-2026-79661MEDIUMEch0 before 4.7.3 Unauthenticated fav_count ModificationEPSS 0.4%