CVE-2026-79668: medium-severity vulnerability in lin-snow Ech0
Ech0 before 4.7.3 Unauthenticated Like Endpoint Metric Inflation
Published · Updated
13Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 6.9epss 0.4%
exploitation probability
0.4%top 62% of all CVEs
observed exploitation
nono source reports it
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.
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
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-2026-79661MEDIUMEch0 before 4.7.3 Unauthenticated fav_count ModificationEPSS 0.4%CVE-2026-79673HIGHEch0 before 4.4.3 Scope Bypass via profile:read TokenEPSS 0.4%