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CVE-2026-73334— Apache Parquet Hadoop: File-controlled KMS URL is forwarded to pluggable KmsClient that skips host validation

Quick assessment

Affected
Apache Software Foundation Apache Parquet Hadoop
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Apache Parquet Hadoop是美国Apache基金会开源的一款一种面向Hadoop生态的列式存储文件格式。 Apache Parquet Hadoop 1.12版本至1.18.0版本存在输入验证错误漏洞，该漏洞源于对 KMS URL 参数输入验证不当，当用户未启用应用控制且可插拔 KmsClient 实现未验证主机时，可能导致 KMS 令牌被发送到攻击者设置的恶意主机。

AI Predicted 5.4 Difficulty: Hard EPSS 0.36% · P29

Affected Version Matrix 1

VendorProduct Version RangeStatus
Apache Software Foundation Apache Parquet Hadoop 1.12≤ 1.18.0 affected
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I. Basic Information for CVE-2026-73334

Vulnerability Information
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Vulnerability Title
Apache Parquet Hadoop: File-controlled KMS URL is forwarded to pluggable KmsClient that skips host validation
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
输入验证不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Apache Parquet Hadoop 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Apache Parquet Hadoop是美国Apache基金会开源的一款一种面向Hadoop生态的列式存储文件格式。 Apache Parquet Hadoop 1.12版本至1.18.0版本存在输入验证错误漏洞，该漏洞源于对 KMS URL 参数输入验证不当，当用户未启用应用控制且可插拔 KmsClient 实现未验证主机时，可能导致 KMS 令牌被发送到攻击者设置的恶意主机。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Apache Software Foundation Apache Parquet Hadoop 1.12 ~ 1.18.0 -

II. Public POCs for CVE-2026-73334

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III. Intelligence Information for CVE-2026-73334

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Mailing List Discussions for CVE-2026-73334 (1)

Same Patch Batch · Apache Software Foundation · 2026-09-09 · 9 CVEs total

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IV. Related Vulnerabilities

Same vendor: Apache Software Foundation
Same weakness: CWE-20