CVE-2026-79668

Ech0 versions before 4.7.3 contain an authentication bypass in the PUT /api/echo/like/:id endpoint. The endpoint lacks both identity verification and rate limiting, allowing unauthenticated attackers to repeatedly increment the fav_count field for any known echo identifier. This can arbitrarily i...

EUVD-2026-65446

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 favcount...

CVE-2026-79661

Ech0 (through 4.5.6) exposes the PUT /api/echo/like/:id endpoint on its public router group with no authentication and no rate limiting . An unauthenticated attacker can increment the fav_count counter of any echo—including private ones—by supplying its UUID, which is harvestable from the public ...