Advisory severityUnratedApache Software Foundation Updated

Advisory [CVE-2026-92287] Pass-through of unvalidated KMS URLs to KMS clients in Apache C++ Parquet and PyArrow versions 4.0.0 to 25.0.1

This security Apache Software Foundation advisory covers CVE-2026-92287; related products: Apache Arrow C++, PyArrow.

Aggregated and source-linked by VulniPulse. Data sources, validation and limitations.

CVE-2026-92287 Source published Oct 20, 2026Source updated Oct 20, 2026

VulniPulse record published Oct 20, 2026Record updated Oct 21, 2026

CVE-2026-92287

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Summary

Pass-through of unvalidated KMS URLs to KMS clients in Apache C++ Parquet and PyArrow versions 4.0.0 to 25.0.1.

This affects users who read Parquet files and configure Parquet decryption properties with a KmsClient implementation.

On the reader side, the KMS URL can be application-controlled (specified in the KmsConnectionConfig) 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 KMS implementation does not perform host validation and makes use of the provided KMS URL, a KMS token can be sent to a malicious host set by an attacker in the file.

Users are recommended to upgrade to version 26.0.0, which disables this behavior by default and requires that users opt-in to it by enabling the read_kms_url flag in the DecryptionConfiguration.

Users of affected versions are recommended to either specify the KMS URL in the KmsConnectionConfig when reading files, or ensure any KmsClient implementations validate received KMS URLs. Users that opt-in to file-controlled KMS URLs in version 26.0.0 and later must ensure KmsClients validate KMS URLs.

Affected products named by the advisory: Apache Arrow C++.

Affected versions

4.0.0
25.0.1

Official advisory · medium-confidence parse· fetched 1 day ago·verify at source

Fixed versions

26.0.0

Official advisory · medium-confidence parse· fetched 1 day ago·verify at source

Mitigation checklist

Recommended fix / mitigation

This affects users who read Parquet files and configure Parquet decryption properties with a KmsClient implementation.
Users are recommended to upgrade to version 26.0.0, which disables this behavior by default and requires that users opt-in to it by enabling the read_kms_url flag in the DecryptionConfiguration.

Official advisory · medium-confidence parse· fetched 1 day ago·verify at source

Sources

Official and corroborating records used to build this advisory.

Official vendor advisoryofficial
Official advisory page fetched and parsed; accepted detail fields are attributed to this page.
Apache Software Foundation
CVE.org CNA recordCVE.org
Independent CNA record used for near-real-time discovery and missed-CVE reconciliation. Discovered from the machine-readable feed https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/delta.json; this link opens the CVE.org record for CVE-2026-92287 instead of the raw feed document.
CVE Program

Cross-references

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CVE-2026-92287NVD CVE.org MITRE

Official resources

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Apache project downloads (fixed releases)
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