CVE-2026-79668CWE-306

CVE-2026-79668

Medium · published August 25, 2026

CVSS v3.1
5.3
EPSS
0%
Percentile
36.6
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
5.3 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
CVSS v4.0
6.9 · CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
EPSS
0.00434 · 36.6th percentile
Weakness
CWE-306 · Missing Authentication for Critical Function
Published
2026-08-25T16:16Z
References (2)
https://github.com/lin-snow/Ech0/security/advisories/GHSA-rgj7-vg8v-j4wr · [email protected]https://www.vulncheck.com/advisories/ech0-before-unauthenticated-like-endpoint-metric-inflation · [email protected]
EPSS history
Timeline
  • 27 AUG 06:46Z
    EPSS moved — → 0%
    epss
  • 25 AUG 11:33Z
    Ech0 before 4.7.3 Unauthenticated Like Endpoint Metric Inflation
    cvelistv5