{"id":"CVE-2026-84851","aliases":["EUVD-2026-70281","GHSA-9gfg-hgj4-gh44"],"status":"published","title":"Uncontrolled recursion in the Ion reader in Amazon Ion-C before 1.1.6","description":"An uncontrolled recursion issue exists in Amazon Ion-C versions before 1.1.6 that might allow a remote unauthenticated actor to craft Ion data that exhausts the native call stack and crashes the application using the library, resulting in a denial of service.","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":0.00609,"percentile":0.49685,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-674"],"published":"2026-09-02T20:19:55Z","modified":"2026-10-28T02:30:28Z","products":[{"vendor":"amazon","product":"ion-c"}],"references":[{"url":"https://github.com/amazon-ion/ion-c/releases/tag/v1.1.6","tags":["release-notes","patch","fix"]},{"url":"https://aws.amazon.com/security/security-bulletins/2026-094-aws/","tags":["vendor-advisory","advisory"]},{"url":"https://github.com/amazon-ion/ion-c/security/advisories/GHSA-9gfg-hgj4-gh44","tags":["release-notes","advisory"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/84xxx/CVE-2026-84851.json","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-84851","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2026-84851","title":"Uncontrolled recursion in the Ion reader in Amazon Ion-C before 1.1.6","description":"An uncontrolled recursion issue exists in Amazon Ion-C versions before 1.1.6 that might allow a remote unauthenticated actor to craft Ion data that exhausts the native call stack and crashes the application using the library, resulting in a denial of service.","status":"published","published":"2026-09-02T20:19:55.616Z","modified":"2026-09-03T13:15:45.459Z","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-674"],"updated_at":"2026-11-02T14:20:08.734143Z"}],"euvd":[{"id":"EUVD-2026-70281","description":"An uncontrolled recursion issue exists in Amazon Ion-C versions before 1.1.6 that might allow a remote unauthenticated actor to craft Ion data that exhausts the native call stack and crashes the application using the library, resulting in a denial of service.","status":"published","published":"2026-09-02T20:19:55Z","modified":"2026-09-03T13:15:45Z","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":"2026-11-02T18:01:14.198061Z"}],"nvd":[{"id":"CVE-2026-84851","description":"An uncontrolled recursion issue exists in Amazon Ion-C versions before 1.1.6 that might allow a remote unauthenticated actor to craft Ion data that exhausts the native call stack and crashes the application using the library, resulting in a denial of service.","status":"published","published":"2026-09-03T05:16:46.64Z","modified":"2026-09-03T16:44:01.873Z","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-674"],"updated_at":"2026-11-02T14:12:43.399612Z"}],"osv":[{"id":"CVE-2026-84851","title":"Uncontrolled recursion in the Ion reader in Amazon Ion-C before 1.1.6","description":"An uncontrolled recursion issue exists in Amazon Ion-C versions before 1.1.6 that might allow a remote unauthenticated actor to craft Ion data that exhausts the native call stack and crashes the application using the library, resulting in a denial of service.","status":"published","published":"2026-09-02T20:19:55.616Z","modified":"2026-10-28T02:30:28.172812709Z","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-674"],"updated_at":"2026-11-02T15:45:18.482949Z"}]}}