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CVE-2025-4166

Vault May Include Sensitive Data in Error Logs When Using the KV v2 Plugin

4.5 MediumFix available

Vault Community and Vault Enterprise Key/Value (kv) Version 2 plugin may unintentionally expose sensitive information in server and audit logs when users submit malformed payloads during secret creation or update operations via the Vault REST API. This vulnerability, identified as CVE-2025-4166, is fixed in Vault Community 1.19.3 and Vault Enterprise 1.19.3, 1.18.9, 1.17.16, 1.16.20.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
High
User interaction
Required

What an attacker can affect

Confidentiality
High
Integrity
None
Availability
None

Exploit likelihood

0.46%Up 0.4 points since May 3, 2025
90%50%10%1%

What each source reports

CVE List Score used 4.5

Vault May Include Sensitive Data in Error Logs When Using the KV v2 Plugin

Vault Community and Vault Enterprise Key/Value (kv) Version 2 plugin may unintentionally expose sensitive information in server and audit logs when users submit malformed payloads during secret creation or update operations via the Vault REST API. This vulnerability, identified as CVE-2025-4166, is fixed in Vault Community 1.19.3 and Vault Enterprise 1.19.3, 1.18.9, 1.17.16, 1.16.20.

Record
CVE-2025-4166
CVSS 3.1
4.5 MediumCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:N/A:N
Weakness
CWE-209
Updated
2026-11-02
EUVDEUVD-2025-13240 4.5

Vault Community and Vault Enterprise Key/Value (kv) Version 2 plugin may unintentionally expose sensitive information in server and audit logs when users submit malformed payloads during secret creation or update operations via the Vault REST API. This vulnerability, identified as CVE-2025-4166, is fixed in Vault Community 1.19.3 and Vault Enterprise 1.19.3, 1.18.9, 1.17.16, 1.16.20.

Record
EUVD-2025-13240
CVSS 3.1
4.5 MediumCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:N/A:N
Updated
2026-11-02
GitHub AdvisoriesGHSA-gcqf-f89c-68hv 4.5

Hashicorp Vault Community vulnerable to Generation of Error Message Containing Sensitive Information

Vault Community and Vault Enterprise Key/Value (kv) Version 2 plugin may unintentionally expose sensitive information in server and audit logs when users submit malformed payloads during secret creation or update operations via the Vault REST API. This vulnerability, identified as CVE-2025-4166, is fixed in Vault Community 1.19.3 and Vault Enterprise 1.19.3, 1.18.9, 1.17.16, 1.16.20.

Record
GHSA-gcqf-f89c-68hv
CVSS 3.1
4.5 MediumCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:N/A:N
Weakness
CWE-209
Updated
2026-11-02
NVD 4.5

Vault Community and Vault Enterprise Key/Value (kv) Version 2 plugin may unintentionally expose sensitive information in server and audit logs when users submit malformed payloads during secret creation or update operations via the Vault REST API. This vulnerability, identified as CVE-2025-4166, is fixed in Vault Community 1.19.3 and Vault Enterprise 1.19.3, 1.18.9, 1.17.16, 1.16.20.

Record
CVE-2025-4166
CVSS 3.1
4.5 MediumCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:N/A:N
CVSS 3.1
6.5 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
Weakness
CWE-209
Updated
2026-11-02
OSVALPINE-CVE-2025-4166 6.5

Vault Community and Vault Enterprise Key/Value (kv) Version 2 plugin may unintentionally expose sensitive information in server and audit logs when users submit malformed payloads during secret creation or update operations via the Vault REST API. This vulnerability, identified as CVE-2025-4166, is fixed in Vault Community 1.19.3 and Vault Enterprise 1.19.3, 1.18.9, 1.17.16, 1.16.20.

Record
ALPINE-CVE-2025-4166
CVSS 3.1
6.5 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
Updated
2026-11-03
OSV 4.5

Vault May Include Sensitive Data in Error Logs When Using the KV v2 Plugin

Vault Community and Vault Enterprise Key/Value (kv) Version 2 plugin may unintentionally expose sensitive information in server and audit logs when users submit malformed payloads during secret creation or update operations via the Vault REST API. This vulnerability, identified as CVE-2025-4166, is fixed in Vault Community 1.19.3 and Vault Enterprise 1.19.3, 1.18.9, 1.17.16, 1.16.20.

Record
CVE-2025-4166
CVSS 3.1
4.5 MediumCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:N/A:N
Weakness
CWE-209
Updated
2026-11-02
Show 6 moreShow less
OSVGHSA-gcqf-f89c-68hv 4.5

Hashicorp Vault Community vulnerable to Generation of Error Message Containing Sensitive Information

Vault Community and Vault Enterprise Key/Value (kv) Version 2 plugin may unintentionally expose sensitive information in server and audit logs when users submit malformed payloads during secret creation or update operations via the Vault REST API. This vulnerability, identified as CVE-2025-4166, is fixed in Vault Community 1.19.3 and Vault Enterprise 1.19.3, 1.18.9, 1.17.16, 1.16.20.

Record
GHSA-gcqf-f89c-68hv
CVSS 3.1
4.5 MediumCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:N/A:N
Weakness
CWE-209
Updated
2026-11-02
OSVBIT-openbao-2025-4166 No score

Vault May Include Sensitive Data in Error Logs When Using the KV v2 Plugin

Vault Community and Vault Enterprise Key/Value (kv) Version 2 plugin may unintentionally expose sensitive information in server and audit logs when users submit malformed payloads during secret creation or update operations via the Vault REST API. This vulnerability, identified as CVE-2025-4166, is fixed in Vault Community 1.19.3 and Vault Enterprise 1.19.3, 1.18.9, 1.17.16, 1.16.20.

Record
BIT-openbao-2025-4166
Updated
2026-11-02
OSVBIT-vault-2025-4166 No score

Vault May Include Sensitive Data in Error Logs When Using the KV v2 Plugin

Vault Community and Vault Enterprise Key/Value (kv) Version 2 plugin may unintentionally expose sensitive information in server and audit logs when users submit malformed payloads during secret creation or update operations via the Vault REST API. This vulnerability, identified as CVE-2025-4166, is fixed in Vault Community 1.19.3 and Vault Enterprise 1.19.3, 1.18.9, 1.17.16, 1.16.20.

Record
BIT-vault-2025-4166
Updated
2026-11-02
OSVGO-2025-3663 No score

Hashicorp Vault Community vulnerable to Generation of Error Message Containing Sensitive Information in github.com/hashicorp/vault

Hashicorp Vault Community vulnerable to Generation of Error Message Containing Sensitive Information in github.com/hashicorp/vault

Record
GO-2025-3663
Updated
2026-11-02
OSVopenSUSE-SU-2025:15059-1 No score

govulncheck-vulndb-0.0.20250506T153719-1.1 on GA media

These are all security issues fixed in the govulncheck-vulndb-0.0.20250506T153719-1.1 package on the GA media of openSUSE Tumbleweed.

Record
openSUSE-SU-2025:15059-1
Updated
2026-11-02
OSVopenSUSE-SU-2025:15186-1 No score

openbao-2.2.2-1.1 on GA media

These are all security issues fixed in the openbao-2.2.2-1.1 package on the GA media of openSUSE Tumbleweed.

Record
openSUSE-SU-2025:15186-1
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
github.com/hashicorp/vault
Go
 0.3.0 up to 1.19.3
1.19.3
openbao
Alpine:v3.22
 before 2.2.2-r0
2.2.2-r0
openbao
Alpine:v3.23
 before 2.2.2-r0
2.2.2-r0
openbao
Alpine:v3.24
 before 2.2.2-r0
2.2.2-r0
openbao
Bitnami
 before 2.2.2
2.2.2
vault
Bitnami
 0.3.0 up to 1.19.3
1.19.3
govulncheck-vulndb
openSUSE:Tumbleweed
 before 0.0.20250506T153719-1.1
0.0.20250506T153719-1.1
openbao
openSUSE:Tumbleweed
 before 2.2.2-1.1
2.2.2-1.1

History

History
RecordedChangedSources
affected, aliases, referencesOSV
first indexedCVE List, EUVD, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2025-4166 is a medium vulnerability (CVSS 4.5) in Hashicorp Vault, published May 2, 2025. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.46%, the 39th percentile. Fixed in github.com/hashicorp/vault 1.19.3.

References

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