{"id":"CVE-2026-79668","state":"PUBLISHED","title":"Ech0 before 4.7.3 Unauthenticated Like Endpoint Metric Inflation","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.","publishedAt":"2026-08-25T11:33:30.130Z","updatedAt":"2026-08-26T16:11:48.745Z","severity":{"score":6.9,"label":"Medium","version":"4.0","vector":"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","source":"VulnCheck"},"assigner":"VulnCheck","products":["lin-snow Ech0"],"affected":[{"vendor":"lin-snow","product":"Ech0","packageURL":"pkg:golang/github.com/lin-snow/ech0","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"4.7.3","versionType":"semver"},{"version":"4.7.3","status":"unaffected","versionType":"semver"}]}],"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"],"weaknesses":["CWE-306"],"ingestedAt":"2026-10-29T20:13:07.220Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/79xxx/CVE-2026-79668.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-79668","state":"PUBLISHED","datePublished":"2026-08-25T11:33:30.130Z","dateUpdated":"2026-08-26T16:11:48.745Z","assignerShortName":"VulnCheck","assignerOrgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","dateReserved":"2026-08-25T11:10:13.697Z"},"containers":{"cna":{"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."}],"affected":[{"vendor":"lin-snow","product":"Ech0","packageURL":"pkg:golang/github.com/lin-snow/ech0","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"4.7.3","versionType":"semver"},{"version":"4.7.3","status":"unaffected","versionType":"semver"}]}],"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)"},{"url":"https://www.vulncheck.com/advisories/ech0-before-unauthenticated-like-endpoint-metric-inflation","name":"VulnCheck Advisory: Ech0 before 4.7.3 Unauthenticated Like Endpoint Metric Inflation","tags":["third-party-advisory"]}],"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"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-306","lang":"en","description":"Missing Authentication for Critical Function","type":"CWE"}]}],"providerMetadata":{"shortName":"VulnCheck","orgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","dateUpdated":"2026-08-25T11:33:30.130Z"},"datePublic":"2026-05-03T00:00:00.000Z","cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:ech0:ech0:*:*:*:*:*:*:*:*","versionEndExcluding":"4.7.3"}]}]}],"credits":[{"lang":"en","value":"VashuVats","type":"reporter"}],"x_generator":{"engine":"vulncheck-endgame"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-08-26T15:58:43.890571Z","id":"CVE-2026-79668","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-08-26T16:11:48.745Z"}}]}}}