{"id":"CVE-2026-84851","summary":"Uncontrolled recursion in the Ion reader in Amazon Ion-C before 1.1.6","details":"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.","aliases":["GHSA-9gfg-hgj4-gh44"],"modified":"2026-09-05T03:31:04.437183320Z","published":"2026-09-02T20:19:55.616Z","database_specific":{"cna_assigner":"AMZN","cwe_ids":["CWE-674"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/84xxx/CVE-2026-84851.json"},"references":[{"type":"ADVISORY","url":"https://aws.amazon.com/security/security-bulletins/2026-094-aws/"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/84xxx/CVE-2026-84851.json"},{"type":"ADVISORY","url":"https://github.com/amazon-ion/ion-c/security/advisories/GHSA-9gfg-hgj4-gh44"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-84851"},{"type":"FIX","url":"https://github.com/amazon-ion/ion-c/releases/tag/v1.1.6"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/amazon-ion/ion-c","events":[{"introduced":"0"},{"fixed":"493c12251be6ad93b924abb5cf8621e69f1dd2d5"}],"database_specific":{"extracted_events":[{"introduced":"0"},{"fixed":"1.1.6"}],"source":["AFFECTED_FIELD","DESCRIPTION","REFERENCES"]}}],"versions":["v1.1.5","v1.1.4","v1.1.3","v1.1.2","v1.1.0","v1.0.6","v1.0.5","v1.4.0","v1.0.3","v1.0.2","v1.0.1","v1.0.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-84851.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"}]}