CVE-2026-54725
Received Received - Intake

Remote Code Execution in vault-secrets-webhook

Publication date: 2026-07-31

Last updated on: 2026-07-31

Assigner: GitHub, Inc.

Description
vault-secrets-webhook is a Kubernetes mutating webhook that makes direct secret injection into Pods possible. Prior to 1.23.1, parseVaultConfig() in pkg/webhook/config.go accepts the vault.security.banzaicloud.io/vault-addr annotation, MutateConfigMap and MutateSecret call newVaultClient in pkg/webhook/webhook.go, and vault.security.banzaicloud.io/vault-serviceaccount can cause a ServiceAccount JWT to be sent to an attacker-controlled Vault address. This issue is fixed in version 1.23.1.

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Meta Information

Published
2026-07-31
Last Modified
2026-07-31
Generated
2026-07-31
AI Q&A
2026-07-31
EPSS Evaluated
N/A
NVD
CVE-2026-54725
EUVD
EUVD-2026-51591

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
banzaicloud vault-secrets-webhook to 1.23.1 (inc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-918 The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination.

Attack-Flow Graph

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Executive Summary

vault-secrets-webhook is a Kubernetes tool that injects secrets into Pods. A flaw in versions before 1.23.1 allows attackers to trick the system into sending sensitive ServiceAccount JWTs to a malicious Vault server by manipulating annotations like vault.security.banzaicloud.io/vault-addr and vault.security.banzaicloud.io/vault-serviceaccount.

Detection Guidance

Check the version of vault-secrets-webhook running in your Kubernetes cluster. If it is below 1.23.1, the system is vulnerable. Run: kubectl get deployment -n <namespace> <deployment-name> -o jsonpath='{.spec.template.spec.containers[0].image}' to check the image version.

Impact Analysis

An attacker could steal secrets or ServiceAccount tokens, leading to unauthorized access to sensitive data or systems. This could result in data breaches, privilege escalation, or further compromise of the Kubernetes cluster.

Compliance Impact

This vulnerability could lead to unauthorized access to personal or health data, violating GDPR or HIPAA requirements for data protection and access control. Non-compliance may result in legal penalties or reputational damage.

Mitigation Strategies

Upgrade vault-secrets-webhook to version 1.23.1 or later to address the vulnerability in parseVaultConfig() and related functions.

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