{"cve":"CVE-2026-73334","nvd":{"published":"2026-09-09T11:17:15.220","modified":"2026-09-10T20:36:22.303","status":"Analyzed","description":"Potential problem for users of the org.apache.parquet.crypto.keytools package in Apache Parquet, versions 1.12 to 1.18. \nThis package enables users to encrypt Parquet files via an envelope encryption mechanism that wraps (encrypts) data keys via a Key Management Service (KMS). \nOn the reader side, the KMS URL can be application-controlled or file-controlled.\nIf the user does not leverage application control for this parameter, a file-controlled KMS URL is forwarded to a pluggable KmsClient implementation. \nIf 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.\n\nBefore the problem is fixed, users are recommended to leverage application control for KMS URL parameter in readers (versions 1.12-1.18).\nAfter 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 \nwill have two options then: leverage application control for KMS URL parameter in readers, or enable file-controlled KMS URL (via a new app parameter).\nThe 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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N","score":8.1},"cwes":["CWE-20"],"references":["https://lists.apache.org/thread/ro2vomk9xxhv34xhvopgys96c9j8ojm0","http://www.openwall.com/lists/oss-security/2026/09/08/11"],"products":["apache:parquet"],"source":"nvd","synced_at":"2026-10-19T22:52:53.108888569+00:00"},"epss":{"cve":"CVE-2026-73334","score":0.00361,"percentile":0.29895,"date":"2026-11-01"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}