CVE-2025-6203CWE-770denial-of-service

CVE-2025-6203

High · published August 29, 2025

CVSS v3.1
7.5
EPSS
1%
Percentile
53.9
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
7.5 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS v4.0
Not supplied
EPSS
0.00734 · 53.9th percentile
Weakness
CWE-770 · Allocation of Resources Without Limits or Throttling
Published
2025-08-29T00:15Z
Affected products (5)
ProductVersionsFixed in
hashicorp/vault≥ 1.15.0, < 1.16.271.16.27
hashicorp/vault≥ 1.15.0, < 1.21.01.21.0
hashicorp/vault≥ 1.18.0, < 1.18.151.18.15
hashicorp/vault≥ 1.19.0, < 1.19.111.19.11
hashicorp/vault≥ 1.20.0, < 1.20.51.20.5
References (1)
https://discuss.hashicorp.com/t/hcsec-2025-24-vault-denial-of-service-though-complex-json-payloads/76393 · [email protected]
EPSS history
Timeline
  • 28 AUG 19:36Z
    Vault unauthenticated denial of service through complex json payload
    cvelistv5