Login Request a demo
High severity · published Aug 28, 2025
CVE-2025-6203
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
7.5
CVSS
0.7%
EPSS
No
On KEV
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:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.7% · higher than 54% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
VA
Vault · Hashicorp
1.15.0 before 1.16.27; 1.15.0 before 1.21.0; 1.18.0 before 1.18.15; 1.19.0 before 1.19.11; 1.20.0 before 1.20.5 · source: NVD
Affected product
VA
Vault
Hashicorp
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-6203
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-6203
Vendor Advisory
https://discuss.hashicorp.com/t/hcsec-2025-24-vault-denial-of-service-though-complex-json-payloads/76393
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