CVE-2025-6203

HIGH EPSS 48.4%
Published Aug 28, 202510mo ago · Modified Jun 17, 20261w ago
7.5 CVSS 3.1
High
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Published Aug 28, 2025 10mo ago
Last Modified Jun 17, 2026 1w ago

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 Details

Base Score
7.5
Exploitability
3.9
Impact
3.6
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
48.4% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available

Weaknesses 1

CWE-770

Affected Products 5

VendorProductVersionRange
hashicorpvault*≥1.15.0  –  <1.16.27
hashicorpvault*≥1.15.0  –  <1.21.0
hashicorpvault*≥1.18.0  –  <1.18.15
hashicorpvault*≥1.19.0  –  <1.19.11
hashicorpvault*≥1.20.0  –  <1.20.5

References 1

  • discuss.hashicorp.com https://discuss.hashicorp.com/t/hcsec-2025-24-vault-denial-of-service-though-complex-json-payloads/76393
    Vendor Advisory

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.