{"id":"CVE-2025-6203","title":"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","summary":"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…","severity":"high","cvss":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cwe":["CWE-770"],"vendor":"hashicorp","product":"vault","affected":["vault >= 1.15.0, < 1.16.27","vault >= 1.15.0, < 1.21.0","vault >= 1.18.0, < 1.18.15","vault >= 1.19.0, < 1.19.11","vault >= 1.20.0, < 1.20.5"],"patched":["vault 1.20.5"],"published":"2025-08-28","updated":"2026-09-26","sourceUpdated":"2026-09-26T00:10:00.127","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2025-6203","references":[{"url":"https://discuss.hashicorp.com/t/hcsec-2025-24-vault-denial-of-service-though-complex-json-payloads/76393","label":"security@hashicorp.com"}],"tags":["nvd"],"epss":0.00699,"epssPercentile":0.51117,"ingestedAt":"2026-09-26T00:22:39.893Z","slug":"CVE-2025-6203","body":"## Overview\n\nA 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.\n\n## Affected\n\n- `vault >= 1.15.0, < 1.16.27`\n- `vault >= 1.15.0, < 1.21.0`\n- `vault >= 1.18.0, < 1.18.15`\n- `vault >= 1.19.0, < 1.19.11`\n- `vault >= 1.20.0, < 1.20.5`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `vault 1.20.5`","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":41.3,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}