{"schema_version":"1.9.0","id":"CVE-2025-6203","published":"2025-08-28T19:36:09.870Z","modified":"2026-08-12T03:51:29.425418162Z","aliases":["BIT-vault-2025-6203","GHSA-8f82-53h8-2p34","GO-2025-3924"],"related":["CGA-hrmr-vq7m-5mjm","SUSE-SU-2025:03289-1","openSUSE-SU-2025:15538-1","openSUSE-SU-2025:15579-1","openSUSE-SU-2026:21483-1"],"summary":"Vault unauthenticated denial of service through complex json payload","details":"A malicious user may submit a specially-crafted complex payload that otherwise meets the default request size limit which results in excessive memory and CPU consumption of Vault. This may lead to a timeout in Vault’s auditing subroutine, potentially resulting in the Vault server to become unresponsive. This vulnerability, CVE-2025-6203, is fixed in Vault Community Edition 1.20.3 and Vault Enterprise 1.20.3, 1.19.9, 1.18.14, and 1.16.25.","affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/hashicorp/vault","events":[{"introduced":"b4d07277a6c5318bb50d3b94bbd6135dccb4c601"},{"fixed":"818ca8b3575ea937ca48b640baf35e1b2ede1833"}],"database_specific":{"cpe":"cpe:2.3:a:hashicorp:vault:*:*:*:*:-:*:*:*","extracted_events":[{"introduced":"1.15.0"},{"fixed":"1.21.0"}],"source":"CPE_RANGE"}}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-6203.json"}}],"references":[{"type":"WEB","url":"https://discuss.hashicorp.com/t/hcsec-2025-24-vault-denial-of-service-though-complex-json-payloads/76393"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/6xxx/CVE-2025-6203.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-6203"},{"type":"PACKAGE","url":"https://github.com/hashicorp/vault"}],"database_specific":{"cna_assigner":"HashiCorp","cwe_ids":["CWE-770"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/6xxx/CVE-2025-6203.json"},"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}]}