{"id":"CVE-2026-85786","summary":"Incomplete fix for CVE-2026-75936 memory-amplification denial of service in Amazon ion-java","details":"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.","modified":"2026-09-06T03:47:20.370168528Z","published":"2026-09-04T19:19:32.274Z","database_specific":{"cwe_ids":["CWE-409"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/85xxx/CVE-2026-85786.json","cna_assigner":"AMZN"},"references":[{"type":"ADVISORY","url":"https://aws.amazon.com/security/security-bulletins/2026-100-aws/"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/85xxx/CVE-2026-85786.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-85786"},{"type":"FIX","url":"https://github.com/amazon-ion/ion-java/releases/tag/v1.12.1"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/amazon-ion/ion-java","events":[{"introduced":"0"},{"fixed":"5210061946558b1768fa2d419c80491760795751"}],"database_specific":{"extracted_events":[{"introduced":"0"},{"fixed":"1.12.1"}],"source":["AFFECTED_FIELD","DESCRIPTION","REFERENCES"]}}],"versions":["v1.12.0","v1.11.11","v1.11.0","v1.10.5","v1.10.4","v1.10.3","v1.10.2","v1.10.1","v1.10.0","v1.9.6","v1.9.5","v1.9.4","v1.9.3","v1.9.0","v1.9.1","v1.8.3","v1.8.2","v1.8.1","v1.8.0","v1.7.1","v1.7.0","v1.6.1","v1.6.0","com_amazon_ion_v1.5.1","com_amazon_ion_v1.5.0","com_amazon_ion_v1.4.0","v1.3.1","v1.3.0","v1.2.0","v1.1.2","v1.1.1","v1.1.0","v1.0.2","v1.0.1","v1.0.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-85786.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"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"}]}