Insertion of Sensitive Information Into Sent Data Affecting github.com/hashicorp/vault/vault package, versions >=0.11.2 <2.0.0
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-GOLANG-GITHUBCOMHASHICORPVAULTVAULT-16110813
- published20 Apr 2026
- disclosed17 Apr 2026
- creditUnknown
Introduced: 17 Apr 2026
CVE-2026-4525 Â (opens in a new tab)How to fix?
Upgrade github.com/hashicorp/vault/vault to version 2.0.0 or higher.
Overview
github.com/hashicorp/vault/vault is a tool for securely accessing secrets.
Affected versions of this package are vulnerable to Insertion of Sensitive Information Into Sent Data through the CheckToken request handling in vault/request_handling.go. An attacker can cause Vault to forward a request containing a Vault bearer token in the Authorization header to a plugin backend by sending a request to a mount or auth method configured to passthrough that header. The backend receives the Vault token alongside any other authorization values, exposing credentials to the plugin and allowing the token to be reused or logged by code that should not see it.
Notes
- The vulnerable path is gated by mounts or auth methods that explicitly list
Authorizationinpassthrough_request_headers; deployments that do not opt into that header passthrough are not exposed by this issue. - The leak is limited to requests that authenticate with a Vault bearer token in the
Authorizationheader.