{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-79668", "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "state": "PUBLISHED", "assignerShortName": "VulnCheck", "dateReserved": "2026-08-25T11:10:13.697Z", "datePublished": "2026-08-25T11:33:30.130Z", "dateUpdated": "2026-08-25T11:33:30.130Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "shortName": "VulnCheck", "dateUpdated": "2026-08-25T11:33:30.130Z"}, "datePublic": "2026-05-03T00:00:00.000Z", "title": "Ech0 before 4.7.3 Unauthenticated Like Endpoint Metric Inflation", "descriptions": [{"lang": "en", "value": "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."}], "problemTypes": [{"descriptions": [{"lang": "en", "description": "Missing Authentication for Critical Function", "cweId": "CWE-306", "type": "CWE"}]}], "affected": [{"vendor": "lin-snow", "product": "Ech0", "defaultStatus": "unaffected", "packageURL": "pkg:golang/github.com/lin-snow/ech0", "versions": [{"version": "0", "status": "affected", "versionType": "semver", "lessThan": "4.7.3"}, {"version": "4.7.3", "status": "unaffected", "versionType": "semver"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:ech0:ech0:*:*:*:*:*:*:*:*", "versionEndExcluding": "4.7.3"}]}]}], "metrics": [{"format": "CVSS", "cvssV4_0": {"version": "4.0", "vectorString": "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", "attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "NONE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "LOW", "vulnAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "baseScore": 6.9, "baseSeverity": "MEDIUM"}}, {"format": "CVSS", "cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "availabilityImpact": "NONE", "baseScore": 5.3, "baseSeverity": "MEDIUM"}}], "references": [{"url": "https://github.com/lin-snow/Ech0/security/advisories/GHSA-rgj7-vg8v-j4wr", "tags": ["vendor-advisory"], "name": "GitHub Security Advisory (GHSA-rgj7-vg8v-j4wr)"}, {"name": "VulnCheck Advisory: Ech0 before 4.7.3 Unauthenticated Like Endpoint Metric Inflation", "tags": ["third-party-advisory"], "url": "https://www.vulncheck.com/advisories/ech0-before-unauthenticated-like-endpoint-metric-inflation"}], "credits": [{"lang": "en", "value": "VashuVats", "type": "reporter"}], "x_generator": {"engine": "vulncheck-endgame"}}}}

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