{"id":"CVE-2026-85786","title":"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…","summary":"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…","severity":"high","cvss":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cwe":["CWE-409"],"published":"2026-09-04","updated":"2026-09-08","sourceUpdated":"2026-09-08T14:00:33.017","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-85786","references":[{"url":"https://aws.amazon.com/security/security-bulletins/2026-100-aws/","label":"ff89ba41-3aa1-4d27-914a-91399e9639e5"},{"url":"https://github.com/amazon-ion/ion-java/releases/tag/v1.12.1","label":"ff89ba41-3aa1-4d27-914a-91399e9639e5"}],"tags":["nvd"],"epss":0.00582,"epssPercentile":0.45389,"ingestedAt":"2026-09-08T15:33:26.964Z","slug":"CVE-2026-85786","body":"## Overview\n\nImproper 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":41.3,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}