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CVE-2025-6037

Vault Certificate Auth Method Did Not Validate Common Name For Non-CA Certificates

MEDIUM
6.8
CVSS Score
Published: August 1, 2025 at 05:52 PM UTC
Updated: June 17, 2026 at 10:01 AM UTC
1 product affected across 1 vendorVault

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Severity
MEDIUM6.8
Exploit prediction
EPSS 0.3%
SSVC
No known exploit

Description

Vault and Vault Enterprise (“Vault”) TLS certificate auth method did not correctly validate client certificates when configured with a non-CA certificate as [+trusted certificate+|https://developer.hashicorp.com/vault/api-docs/auth/cert#certificate]. In this configuration, an attacker may be able to craft a malicious certificate that could be used to impersonate another user. Fixed in Vault Community Edition 1.20.1 and Vault Enterprise 1.20.1, 1.19.7, 1.18.12, and 1.16.23.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Vault· Hashicorp
95%
v < 1.16.23v < 1.20.11.17.0 ≤ v < 1.18.121.19.0 ≤ v < 1.19.71.20.0
Affected range stops below 1.16.23, so it looks safe — our inference, not a vendor statement
Affected range stops below 1.18.12, so it looks safe — our inference, not a vendor statement
Affected range stops below 1.19.7, so it looks safe — our inference, not a vendor statement
Affected range stops below 1.20.1, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (1)

Vendor Advisory
Source: [email protected]
https://discuss.hashicorp.com/t/hcsec-2025-18-vault-certificate-auth-method-did-not-validate-common-name-for-non-ca-certificates/76037

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

6.8MEDIUMHashiCorp
Vector?

Quick Info

StatusANALYZED
CWE
CWE-295

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