CVE-2025-6203 — Vault unauthenticated denial of service through complex json payload

Description (CNA)

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 (CNA)

Vendor / product	Versions
HashiCorp / Vault	affected 1.15.0 before 1.21.0
HashiCorp / Vault Enterprise	affected 1.15.0 before 1.21.2

CWE

CWE-770

References

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

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.