{"id":"CVE-2025-12829","details":"An uninitialized stack read issue exists in Amazon Ion-C versions \u003cv1.1.4 that may allow a threat actor to craft data and serialize it to Ion text in such a way that sensitive data in memory could be exposed through UTF-8 escape sequences. To mitigate this issue, users should upgrade to version v1.1.4.","aliases":["GHSA-7mgf-6x73-5h7r"],"modified":"2026-08-12T03:51:43.944737407Z","published":"2025-11-07T18:04:15.700Z","database_specific":{"unresolved_ranges":[{"source":"DESCRIPTION","extracted_events":[{"fixed":"UTF-8"}]}],"cna_assigner":"AMZN","cwe_ids":["CWE-125"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/12xxx/CVE-2025-12829.json"},"references":[{"type":"ADVISORY","url":"https://aws.amazon.com/security/security-bulletins/AWS-2025-027/"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/12xxx/CVE-2025-12829.json"},{"type":"ADVISORY","url":"https://github.com/amazon-ion/ion-c/security/advisories/GHSA-7mgf-6x73-5h7r"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-12829"},{"type":"FIX","url":"https://github.com/amazon-ion/ion-c/releases/tag/v1.1.4"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/amazon-ion/ion-c","events":[{"introduced":"0"},{"fixed":"49c53b55e1245a8aa161054dda41829fd687766a"}],"database_specific":{"source":"REFERENCES"}}],"versions":["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-2025-12829.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N"}]}