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CVE-2025-4166

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

Published: May 2, 2025Updated: Dec 31, 2025 Sources: CVE List NVD GHSA BDUCWE-209
NVD MITRE
4.5CVSSMEDIUM
EPSS Score
0.3%
Top 74.9%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

Description

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.

CVSS Vector Breakdown

AV:NAC:LPR:HUI:RS:UC:HI:NA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:HPrivileges Required
High
UI:RUser Interaction
Required
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:NIntegrity
None
A:NAvailability
None
Open in CVSS calculator →

Weaknesses

CWE-209

Affected Products

openSUSE TumbleweedNovell Inc.
On-premOS
Operating Systems / linux-distro
РЕД ОСООО «Ред Софт»
On-premOS
Operating Systems / linux-distro
Red Hat Openshift Data FoundationRed Hat Inc.
On-prem
Cloud & SaaS / container-orchestration
Vault EnterpriseHashiCorp
SaaSSaaS Service
Cloud & SaaS
Vault Community EditionHashiCorp
On-prem
Cloud & SaaS / api-gateway
novell inc.commercialUSOperating Systems
ооо «ред софт»commercialRUOperating Systemsaka red soft
red hat inc.commercialUSOperating Systemsaka red hat
hashicorpcommercialUSCloud & SaaSaka hashicorp inc.
and 4 more affected products View all →

Attack Graph

Products CVE Techniques Tactics

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Exploitability

Official Patch Available

MITRE ATT&CK

1 technique
Discovery
View detailed technique mapping

References

https://discuss.hashicorp.com/t/hcsec-2025-09-vault-may-expose-sensitive-information-in-error-logs-when-processing-malformed-data-with-the-kv-v2-plugin
discuss.hashicorp.com
https://redos.red-soft.ru/support/secure/
redos.red-soft.ru
https://access.redhat.com/security/cve/cve-2025-4166
access.redhat.com
and 5 more references View all →

Timeline

Published
May 2, 2025
Last Updated
Dec 31, 2025

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