{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-72587","assignerOrgId":"309f9ea4-e3e9-4c6c-b79d-e8eb01244f2c","state":"PUBLISHED","assignerShortName":"TuranSec","dateReserved":"2026-08-10T10:32:53.854Z","datePublished":"2026-08-10T10:41:36.489Z","dateUpdated":"2026-08-10T13:21:33.909Z"},"containers":{"cna":{"providerMetadata":{"orgId":"309f9ea4-e3e9-4c6c-b79d-e8eb01244f2c","shortName":"TuranSec","dateUpdated":"2026-08-10T11:48:13.594Z"},"title":"Instatic - Cache Poisoning via Unauthenticated Server Island Endpoint","descriptions":[{"lang":"en","value":"A cache poisoning vulnerability in CoreBunch/Instatic through 0.0.14 allows an unauthenticated remote attacker to poison the shared process-wide render cache by manipulating the u query parameter of the GET /_instatic/hole/<nodeId> server island endpoint.","supportingMedia":[{"type":"text/html","base64":false,"value":"<p>A cache poisoning vulnerability in CoreBunch/Instatic through 0.0.14 allows an unauthenticated remote attacker to poison the shared process-wide render cache by manipulating the u query parameter of the GET /_instatic/hole/<nodeId> server island endpoint.</p>"}]}],"affected":[{"vendor":"CoreBunch","product":"Instatic","versions":[{"version":"0","status":"affected","versionType":"semver","lessThanOrEqual":"0.0.14"}],"defaultStatus":"unknown"}],"references":[{"url":"https://github.com/CoreBunch/Instatic","name":"Product","tags":["third-party-advisory"]}],"credits":[{"lang":"en","value":"Komiljon Ayubov","type":"finder"}],"metrics":[{"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}],"cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","baseScore":6.1,"baseSeverity":"MEDIUM","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"REQUIRED","scope":"CHANGED","confidentialityImpact":"LOW","integrityImpact":"LOW","availabilityImpact":"NONE"}}],"problemTypes":[{"descriptions":[{"lang":"en","type":"CWE","cweId":"CWE-444","description":"CWE-444: Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')"}]}],"timeline":[{"time":"2026-08-10T10:32:53.000Z","lang":"en","value":"CVE Reserved"},{"time":"2026-08-10T10:32:53.000Z","lang":"en","value":"Public Disclosure"}],"source":{"discovery":"EXTERNAL"},"datePublic":"2026-08-10T10:32:53.000Z"},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-08-10T13:21:23.037495Z","id":"CVE-2026-72587","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-08-10T13:21:33.909Z"}}]}}