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.
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Apache Software Foundation | Apache Parquet Hadoop | unaffected |
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Solution
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Workaround
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Wed, 09 Sep 2026 12:30:00 +0000
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Wed, 09 Sep 2026 11:00:00 +0000
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| 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. | |
| Title | Apache Parquet Hadoop: File-controlled KMS URL is forwarded to pluggable KmsClient that skips host validation | |
| Weaknesses | CWE-20 | |
| References |
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Projects
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MITRE
Status: PUBLISHED
Assigner: apache
Published:
Updated: 2026-09-09T11:10:59.669Z
Reserved: 2026-08-12T06:00:31.756Z
Link: CVE-2026-73334
Vulnrichment
No data.
NVD
Status : Awaiting Analysis
Published: 2026-09-09T11:17:15.220
Modified: 2026-09-09T15:37:09.320
Link: CVE-2026-73334
Redhat
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OpenCVE Enrichment
Updated: 2026-09-09T12:30:09Z