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. This may lead to a timeout in Vaults 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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTNIST
7.5 HIGH
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
HashiCorpCNA
7.5 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CISA-ADPADP
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Base Score
CVSS 3.x
EPSS Score
Percentile: 14%
VendorProductVersion
hashicorpvault
1.15.0 ≤
𝑥
< 1.16.27
hashicorpvault
1.15.0 ≤
𝑥
< 1.21.0
hashicorpvault
1.18.0 ≤
𝑥
< 1.18.15
hashicorpvault
1.19.0 ≤
𝑥
< 1.19.11
hashicorpvault
1.20.0 ≤
𝑥
< 1.20.5
𝑥
= Vulnerable software versions
Common Weakness Enumeration
References
https://discuss.hashicorp.com/t/hcsec-2025-24-vault-denial-of-service-though-complex-json-payloads/76393