CVE-2026-79668: Lin-Snow ECH0

Medium severity, CVSS 5.3. EPSS: 0.4% chance of exploitation in the next 30 days.

Ech0 before 4.7.3 contains an authentication bypass vulnerability in the PUT /api/echo/like/:id endpoint that allows unauthenticated attackers to increment engagement metrics without identity verification or rate limiting. Attackers can send repeated requests to arbitrarily inflate the fav_count field for any known echo identifier, compromising the integrity of engagement metrics and social ranking systems.

Affected products

• Lin-Snow ECH0: before 4.7.3 (fixed in 4.7.3)

Published 2026-08-25. Last modified 2026-08-31.