{"id":"CVE-2026-75935","aliases":["EUVD-2026-61173","GHSA-822f-6gg9-whr5"],"status":"published","title":"Memory-amplification denial of service via declared-length preallocation in Amazon ion-java","description":"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.","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":"2026-11-10","score":0.00609,"percentile":0.49518,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-789"],"published":"2026-08-18T19:33:46Z","modified":"2026-10-28T02:31:05Z","products":[{"vendor":"amazon ion","product":"amazon ion java"}],"references":[{"url":"https://github.com/amazon-ion/ion-java/releases/tag/v1.12.0","tags":["patch","fix"]},{"url":"https://aws.amazon.com/security/security-bulletins/2026-083-aws/","tags":["vendor-advisory","advisory"]},{"url":"https://github.com/amazon-ion/ion-java/security/advisories/GHSA-822f-6gg9-whr5","tags":["third-party-advisory","advisory"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/75xxx/CVE-2026-75935.json","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-75935","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2026-75935","title":"Memory-amplification denial of service via declared-length preallocation in Amazon ion-java","description":"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.","status":"published","published":"2026-08-18T19:33:46.609Z","modified":"2026-08-19T13:06:29.729Z","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-789"],"updated_at":"2026-11-02T14:20:07.260654Z"}],"euvd":[{"id":"EUVD-2026-61173","description":"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.","status":"published","published":"2026-08-18T19:33:46Z","modified":"2026-08-19T13:06:29Z","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":"2026-11-02T18:01:45.260244Z"}],"nvd":[{"id":"CVE-2026-75935","description":"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.","status":"published","published":"2026-08-18T20:17:34.13Z","modified":"2026-10-22T22:10:00.25Z","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-789"],"updated_at":"2026-11-02T14:12:38.976695Z"}],"osv":[{"id":"CVE-2026-75935","title":"Memory-amplification denial of service via declared-length preallocation in Amazon ion-java","description":"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.","status":"published","published":"2026-08-18T19:33:46.609Z","modified":"2026-10-28T02:31:05.114199474Z","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-789"],"updated_at":"2026-11-02T15:45:17.102988Z"}]}}