Vault Community and Vault Enterprise rekey and recovery key operations can lead to a denial of service due to uncontrolled cancellation by a Vault operator. This vulnerability (CVE-2025-4656) has been remediated in Vault Community Edition 1.20.0 and Vault Enterprise 1.20.0, 1.19.6, 1.18.11, 1.17.17, and 1.16.22.
The code has a synchronous call to a remote resource, but there is no timeout for the call, or the timeout is set to infinite.
This issue can prevent the product from running reliably, since an outage for the remote resource can cause the product to hang. If the relevant code is reachable by an attacker, then this reliability problem might introduce a vulnerability.