CVE-2025-6203 — Allocation of Resources Without Limits or Throttling in Vault Enterprise
Severity
7.5HIGHNVD
EPSS
0.1%
top 82.65%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
Timeline
PublishedAug 28
Latest updateOct 17
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HExploitability: 3.9 | Impact: 3.6
Affected Packages4 packages
🔴Vulnerability Details
5OSV▶
OpenBao has potential Denial of Service vulnerability when processing malicious unauthenticated JSON requests↗2025-10-17
GHSA▶
OpenBao has potential Denial of Service vulnerability when processing malicious unauthenticated JSON requests↗2025-10-17
OSV▶
HashiCorp Vault Community Edition Denial of Service Though Complex JSON Payloads in github.com/hashicorp/vault↗2025-09-08