CVE-2025-6203: Vault unauthenticated denial of service through complex json payload
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 Software
Event History
Frequently Asked Questions
What is the severity of CVE-2025-6203?
CVE-2025-6203 is considered a medium severity vulnerability due to its potential to exhaust system resources.
How do I fix CVE-2025-6203?
To remediate CVE-2025-6203, upgrade HashiCorp Vault to the latest version available beyond 1.20.3.
What are the potential impacts of CVE-2025-6203?
The impacts of CVE-2025-6203 include excessive memory and CPU consumption, leading to timeouts in Vault's auditing processes.
Which versions are affected by CVE-2025-6203?
CVE-2025-6203 affects HashiCorp Vault Community Edition and Enterprise versions up to 1.20.3, 1.19.9, 1.18.14, and 1.16.25.
Is there a workaround for CVE-2025-6203?
Currently, no specific workaround is provided for CVE-2025-6203 other than upgrading to a patched version.