CVE-2026-73334

/// Technical description

Potential problem for users of the org.apache.parquet.crypto.keytools package in Apache Parquet, versions 1.12 to 1.18.

This package enables users to encrypt Parquet files via an envelope encryption mechanism that wraps (encrypts) data keys via a Key Management Service (KMS). 

On the reader side, the KMS URL can be application-controlled or file-controlled.

If the user does not leverage application control for this parameter, a file-controlled KMS URL is forwarded to a pluggable KmsClient implementation.

If the pluggable implementation does not perform host validation, a KMS token can be sent to a malicious host set by an attacker in the file.

Before the problem is fixed, users are recommended to leverage application control for KMS URL parameter in readers (versions 1.12-1.18).

After the problem is fixed (presumably in version 1.19), the upgrade will disable file-controlled KMS URL by default. Users of the KMS URL parameter 

will have two options then: leverage application control

/// Remediation

Check the references section for vendor advisories and patches from apache. Update parquet to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

/// Affected products

/// References