CVE-2025-6203

HighCVSS 7.5/10Last modified Sep 26, 2026

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.

Metrics

CVSS 3.1 7.5/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Weakness enumeration

CWE-770

Affected software

Vendor	Product	Versions
HashiCorp	Vault	>= 1.15.0, < 1.21.0
HashiCorp	Vault Enterprise	>= 1.15.0, < 1.21.2

References

https://discuss.hashicorp.com/t/hcsec-2025-24-vault-denial-of-service-though-complex-json-payloads/76393Vendor Advisory

Timeline

Published: Aug 28, 2025
Last modified: Sep 26, 2026
NVD status: Analyzed

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