CVE-2026-79668

Description

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.

References

• https://github.com/lin-snow/Ech0/security/advisories/GHSA-rgj7-vg8v-j4wr
• https://www.vulncheck.com/advisories/ech0-before-unauthenticated-like-endpoint-metric-inflation