{"id":"CVE-2026-72587","aliases":["EUVD-2026-55219","GHSA-9p8f-ppfj-8gc5"],"status":"published","title":"Instatic - Cache Poisoning via Unauthenticated Server Island Endpoint","description":"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/\u003cnodeId\u003e server island endpoint.","severity":{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.00315,"percentile":0.24664,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-444"],"published":"2026-08-10T10:41:36Z","modified":"2026-10-28T02:30:59Z","products":[{"vendor":"corebunch","product":"instatic"}],"references":[{"url":"https://github.com/CoreBunch/Instatic","tags":["third-party-advisory","advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-72587","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-9p8f-ppfj-8gc5"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/72xxx/CVE-2026-72587.json","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2026-72587","title":"Instatic - Cache Poisoning via Unauthenticated Server Island Endpoint","description":"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/\u003cnodeId\u003e server island endpoint.","status":"published","published":"2026-08-10T10:41:36.489Z","modified":"2026-08-10T13:21:33.909Z","cvss":[{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","level":"medium","assessor":"cna"}],"cwes":["CWE-444"],"updated_at":"2026-11-02T14:19:52.016971Z"}],"euvd":[{"id":"EUVD-2026-55219","description":"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/\u003cnodeId\u003e server island endpoint.","status":"published","published":"2026-08-10T10:41:36Z","modified":"2026-08-10T13:21:33Z","cvss":[{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","level":"medium"}],"updated_at":"2026-11-02T18:02:05.388264Z"}],"ghsa":[{"id":"GHSA-9p8f-ppfj-8gc5","title":"A cache poisoning vulnerability in CoreBunch/Instatic through 0.0.14 allows an unauthenticated...","description":"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/\u003cnodeId\u003e server island endpoint.","status":"published","published":"2026-08-10T12:31:53Z","modified":"2026-08-10T12:32:01Z","cvss":[{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","level":"medium"}],"cwes":["CWE-444"],"updated_at":"2026-11-02T15:10:13.54571Z"}],"nvd":[{"id":"CVE-2026-72587","description":"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/\u003cnodeId\u003e server island endpoint.","status":"published","published":"2026-08-10T11:17:31.76Z","modified":"2026-10-24T15:10:00.19Z","cvss":[{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","level":"medium","assessor":"secondary"}],"cwes":["CWE-444"],"updated_at":"2026-11-02T14:12:35.743275Z"}],"osv":[{"id":"CVE-2026-72587","title":"Instatic - Cache Poisoning via Unauthenticated Server Island Endpoint","description":"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/\u003cnodeId\u003e server island endpoint.","status":"published","published":"2026-08-10T10:41:36.489Z","modified":"2026-10-28T02:30:59.847958885Z","cvss":[{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","level":"medium"}],"cwes":["CWE-444"],"updated_at":"2026-11-02T15:45:15.88521Z"}]}}