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.
Advisories
Source ID Title
EUVD EUVD EUVD-2025-26143 HashiCorp Vault Community Edition Denial of Service Though Complex JSON Payloads
Github GHSA Github GHSA GHSA-8f82-53h8-2p34 HashiCorp Vault Community Edition Denial of Service Though Complex JSON Payloads
Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

Fri, 19 Dec 2025 03:00:00 +0900

Type Values Removed Values Added
CPEs cpe:2.3:a:hashicorp:vault:*:*:*:*:-:*:*:*
cpe:2.3:a:hashicorp:vault:*:*:*:*:enterprise:*:*:*

Sun, 31 Aug 2025 17:45:00 +0900

Type Values Removed Values Added
First Time appeared Hashicorp
Hashicorp vault
Hashicorp vault Enterprise
Vendors & Products Hashicorp
Hashicorp vault
Hashicorp vault Enterprise

Fri, 29 Aug 2025 23:15:00 +0900

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Fri, 29 Aug 2025 09:15:00 +0900

Type Values Removed Values Added
References
Metrics threat_severity

None

threat_severity

Important


Fri, 29 Aug 2025 07:30:00 +0900

Type Values Removed Values Added
References

Fri, 29 Aug 2025 06:45:00 +0900


Fri, 29 Aug 2025 04:45:00 +0900

Type Values Removed Values Added
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.
Title Vault unauthenticated denial of service through complex json payload
Weaknesses CWE-770
References
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: HashiCorp

Published:

Updated: 2025-10-23T18:18:34.361Z

Reserved: 2025-06-17T13:39:36.506Z

Link: CVE-2025-6203

cve-icon Vulnrichment

Updated: 2025-08-29T13:36:49.616Z

cve-icon NVD

Status : Analyzed

Published: 2025-08-28T20:15:43.817

Modified: 2025-12-18T17:55:00.780

Link: CVE-2025-6203

cve-icon Redhat

Severity : Important

Publid Date: 2025-08-28T19:36:09Z

Links: CVE-2025-6203 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2025-08-31T17:41:43Z

Weaknesses