CVE-2025-6203
Vault unauthenticated denial of service through complex json payload
7.5
HIGH
CVSS 3.1
EPSS 0.10%
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.
How to fix CVE-2025-6203
To remediate CVE-2025-6203, upgrade the affected package to a fixed version below.
- —upgrade to 1.20.3 or later
- —upgrade to 1.20.3 or later
- —upgrade to 1.20.3 or later
Is CVE-2025-6203 being exploited?
Low — EPSS is 0.1%, meaning exploitation activity has not been observed at scale.
Affected packages (3)
- >= 1.15.0, < 1.20.3
- from 0, < 1.20.3
- from 0, < 1.20.3
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |