SEPTEMBER 11, 2026
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Case File

CVE-2026-73334

HIGH · CVSS 8.1 EPSS 0.38%

Source: NVD + CISA KEV + EPSS · Published 2026-09-09 · Last synced 2026-09-11

CyberRota Analysis

AI-Generated

The vulnerability affects the org.apache.parquet.crypto.keytools package in Apache Parquet versions 1.12 to 1.18, where improper handling of the KMS URL parameter can lead to the exposure of sensitive KMS tokens to malicious hosts if application control is not enforced. This could allow attackers to intercept encrypted data keys, compromising the confidentiality of encrypted Parquet files. Users of affected versions should prioritize implementing application control for the KMS URL parameter and prepare to upgrade to version 1.19, which will enhance security by disabling file-controlled KMS URLs by default.

CVE
CVE-2026-73334
Severity
HIGH
CVSS
8.1
EPSS
0.38%
Apache

Original NVD 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 for KMS URL parameter in readers, or enable file-controlled KMS URL (via a new app parameter). The latter option will explicitly require (in the new parameter documentation) to validate the KMS URL and use authentication in the custom implementation of the KMS client plug in.

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