{"id":"CVE-2026-85786","aliases":["EUVD-2026-71714"],"status":"published","title":"Incomplete fix for CVE-2026-75936 memory-amplification denial of service in Amazon ion-java","description":"Improper handling of highly compressed data in Amazon ion-java before 1.12.1 might allow remote attackers to cause a denial of service via a crafted compressed Ion document that expands to an arbitrarily large size upon decompression due to insufficient coverage of the GZIP auto-decompression opt-out introduced for CVE-2026-75936.\n\n\n\nTo remediate this issue, users should upgrade to version 1.12.1.","severity":{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.00582,"percentile":0.48283,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-409"],"published":"2026-09-04T19:19:32Z","modified":"2026-10-28T02:31:01Z","products":[{"vendor":"amazon","product":"ion-java"},{"vendor":"amazon-ion","product":"ion-java"}],"references":[{"url":"https://github.com/amazon-ion/ion-java/releases/tag/v1.12.1","tags":["patch","release-notes","fix"]},{"url":"https://aws.amazon.com/security/security-bulletins/2026-100-aws/","tags":["vendor-advisory","advisory"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/85xxx/CVE-2026-85786.json","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-85786","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2026-85786","title":"Incomplete fix for CVE-2026-75936 memory-amplification denial of service in Amazon ion-java","description":"Improper handling of highly compressed data in Amazon ion-java before 1.12.1 might allow remote attackers to cause a denial of service via a crafted compressed Ion document that expands to an arbitrarily large size upon decompression due to insufficient coverage of the GZIP auto-decompression opt-out introduced for CVE-2026-75936.\n\n\n\nTo remediate this issue, users should upgrade to version 1.12.1.","status":"published","published":"2026-09-04T19:19:32.274Z","modified":"2026-09-04T19:27:28.963Z","cvss":[{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","level":"high","assessor":"cna"},{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"cna"}],"cwes":["CWE-409"],"updated_at":"2026-11-02T14:19:52.410665Z"}],"euvd":[{"id":"EUVD-2026-71714","description":"Improper handling of highly compressed data in Amazon ion-java before 1.12.1 might allow remote attackers to cause a denial of service via a crafted compressed Ion document that expands to an arbitrarily large size upon decompression due to insufficient coverage of the GZIP auto-decompression opt-out introduced for CVE-2026-75936.\n\n\n\nTo remediate this issue, users should upgrade to version 1.12.1.","status":"published","published":"2026-09-04T19:19:32Z","modified":"2026-09-04T19:27:28Z","cvss":[{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","level":"high"}],"updated_at":"2026-11-02T18:01:11.238356Z"}],"nvd":[{"id":"CVE-2026-85786","description":"Improper handling of highly compressed data in Amazon ion-java before 1.12.1 might allow remote attackers to cause a denial of service via a crafted compressed Ion document that expands to an arbitrarily large size upon decompression due to insufficient coverage of the GZIP auto-decompression opt-out introduced for CVE-2026-75936.\n\n\n\nTo remediate this issue, users should upgrade to version 1.12.1.","status":"published","published":"2026-09-04T20:17:33.153Z","modified":"2026-09-08T14:00:33.017Z","cvss":[{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"high","assessor":"secondary"},{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"secondary"}],"cwes":["CWE-409"],"updated_at":"2026-11-02T14:12:44.082631Z"}],"osv":[{"id":"CVE-2026-85786","title":"Incomplete fix for CVE-2026-75936 memory-amplification denial of service in Amazon ion-java","description":"Improper handling of highly compressed data in Amazon ion-java before 1.12.1 might allow remote attackers to cause a denial of service via a crafted compressed Ion document that expands to an arbitrarily large size upon decompression due to insufficient coverage of the GZIP auto-decompression opt-out introduced for CVE-2026-75936.\n\n\n\nTo remediate this issue, users should upgrade to version 1.12.1.","status":"published","published":"2026-09-04T19:19:32.274Z","modified":"2026-10-28T02:31:01.119222464Z","cvss":[{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","level":"high"}],"cwes":["CWE-409"],"updated_at":"2026-11-02T15:45:18.825071Z"}]}}