{"id":"CVE-2025-6203","aliases":["BIT-vault-2025-6203","GHSA-8f82-53h8-2p34","GO-2025-3924"],"url":"https://o3.security/vulnerability/CVE-2025-6203","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.","published":"2025-08-28T19:36:09.870Z","modified":"2026-08-12T03:51:29.425418162Z","cvss":{"score":7.5,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Go","name":"github.com/hashicorp/vault","fixedVersion":"1.20.3"}],"fix":{"url":"https://github.com/hashicorp/vault/commit/eedc2b7426f30e57e306229ce697ce81e203ab89","label":"hashicorp/vault@eedc2b7"},"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"},{"type":"WEB","url":"https://github.com/hashicorp/vault/commit/eedc2b7426f30e57e306229ce697ce81e203ab89"},{"type":"WEB","url":"https://discuss.hashicorp.com"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:29.425418162Z"}}