{"id":"CVE-2025-6203","state":"PUBLISHED","title":"Vault unauthenticated denial of service through complex json payload","description":"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.","publishedAt":"2025-08-28T19:36:09.870Z","updatedAt":"2025-10-23T18:18:34.361Z","severity":{"score":7.5,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","source":"HashiCorp"},"assigner":"HashiCorp","products":["HashiCorp Vault","HashiCorp Vault Enterprise"],"affected":[{"vendor":"HashiCorp","product":"Vault","defaultStatus":"unaffected","versions":[{"version":"1.15.0","status":"affected","lessThan":"1.21.0","versionType":"semver"}],"platforms":["64 bit","32 bit","x86","ARM","MacOS","Windows","Linux"],"repo":"https://github.com/hashicorp/vault"},{"vendor":"HashiCorp","product":"Vault Enterprise","defaultStatus":"unaffected","versions":[{"version":"1.15.0","status":"affected","lessThan":"1.21.2","changes":[{"at":"1.20.5","status":"unaffected"},{"at":"1.19.11","status":"unaffected"},{"at":"1.16.27","status":"unaffected"}],"versionType":"semver"}],"platforms":["64 bit","32 bit","x86","ARM","MacOS","Windows","Linux"],"repo":"https://github.com/hashicorp/vault"}],"references":["https://discuss.hashicorp.com/t/hcsec-2025-24-vault-denial-of-service-though-complex-json-payloads/76393"],"weaknesses":["CWE-770"],"ingestedAt":"2026-10-29T20:10:04.440Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2025/6xxx/CVE-2025-6203.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.1","cveMetadata":{"cveId":"CVE-2025-6203","state":"PUBLISHED","datePublished":"2025-08-28T19:36:09.870Z","dateUpdated":"2025-10-23T18:18:34.361Z","assignerShortName":"HashiCorp","assignerOrgId":"67fedba0-ff2e-4543-ba5b-aa93e87718cc","dateReserved":"2025-06-17T13:39:36.506Z"},"containers":{"cna":{"title":"Vault unauthenticated denial of service through complex json payload","descriptions":[{"lang":"en","value":"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":[{"vendor":"HashiCorp","product":"Vault","defaultStatus":"unaffected","versions":[{"version":"1.15.0","status":"affected","lessThan":"1.21.0","versionType":"semver"}],"platforms":["64 bit","32 bit","x86","ARM","MacOS","Windows","Linux"],"repo":"https://github.com/hashicorp/vault"},{"vendor":"HashiCorp","product":"Vault Enterprise","defaultStatus":"unaffected","versions":[{"version":"1.15.0","status":"affected","lessThan":"1.21.2","changes":[{"at":"1.20.5","status":"unaffected"},{"at":"1.19.11","status":"unaffected"},{"at":"1.16.27","status":"unaffected"}],"versionType":"semver"}],"platforms":["64 bit","32 bit","x86","ARM","MacOS","Windows","Linux"],"repo":"https://github.com/hashicorp/vault"}],"references":[{"url":"https://discuss.hashicorp.com/t/hcsec-2025-24-vault-denial-of-service-though-complex-json-payloads/76393"}],"metrics":[{"cvssV3_1":{"baseScore":7.5,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}]}],"problemTypes":[{"descriptions":[{"cweId":"CWE-770","description":"CWE-770: Allocation of Resources Without Limits or Throttling","lang":"en","type":"CWE"}]}],"providerMetadata":{"shortName":"HashiCorp","orgId":"67fedba0-ff2e-4543-ba5b-aa93e87718cc","dateUpdated":"2025-10-23T18:18:34.361Z"},"impacts":[{"capecId":"CAPEC-469","descriptions":[{"lang":"en","value":"CAPEC-469: HTTP DoS"}]}],"source":{"advisory":"HCSEC-2025-24","discovery":"EXTERNAL"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2025-08-29T13:36:43.373189Z","id":"CVE-2025-6203","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2025-08-29T13:36:52.434Z"}}]}}}