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.
- Exploited in the wild
- Not known
- Fix
- None listed
What is CVE-2026-92287?
CVE-2026-92287 is a high-severity vulnerability in Apache Arrow C++, published on 20 Oct 2026.
Official description
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.
Weakness: CWE-20
Which versions are affected by CVE-2026-92287?
How do I fix CVE-2026-92287?
No fix has been published for CVE-2026-92287 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-92287 being exploited?
There is no known exploitation of CVE-2026-92287 in the wild and no public exploit code.
Sources
Also known as AZL-109896, AZL-110001, DEBIAN-CVE-2026-92287, GHSA-3xf4-85xv-wmpw, UBUNTU-CVE-2026-92287.