{"id":"CVE-2026-75935","summary":"Memory-amplification denial of service via declared-length preallocation in Amazon ion-java","details":"Uncontrolled memory allocation in the binary Ion stream cursor in Amazon ion-java before 1.12.0 might allow remote actors to cause a denial of service via a crafted Ion binary document containing a declared-length field that causes excessive heap preallocation.\n\n\n\nTo remediate this issue, users should upgrade to version 1.12.0.","aliases":["GHSA-822f-6gg9-whr5"],"modified":"2026-08-22T03:30:58.815208971Z","published":"2026-08-18T19:33:46.609Z","database_specific":{"cna_assigner":"AMZN","cwe_ids":["CWE-789"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/75xxx/CVE-2026-75935.json"},"references":[{"type":"ADVISORY","url":"https://aws.amazon.com/security/security-bulletins/2026-083-aws/"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/75xxx/CVE-2026-75935.json"},{"type":"ADVISORY","url":"https://github.com/amazon-ion/ion-java/security/advisories/GHSA-822f-6gg9-whr5"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-75935"},{"type":"FIX","url":"https://github.com/amazon-ion/ion-java/releases/tag/v1.12.0"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/amazon-ion/ion-java","events":[{"introduced":"2d1eddc969fb38348e57a9262729a68964830cdb"},{"fixed":"fb918688bff7dfcfb377d8dbdea65fc785d5ae99"}],"database_specific":{"source":["AFFECTED_FIELD","DESCRIPTION","REFERENCES"],"extracted_events":[{"introduced":"1.9.0"},{"fixed":"1.12.0"},{"introduced":"0"}]}}],"versions":["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"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-75935.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"}]}