Apache Ranger CVE-2026-42537

Exploitation requires the ability to supply or influence a JDBC connection URL used by Apache Ranger (<=2.8.0) - i.e., reaching the service/datasource configuration or connection-test functionality of the Ranger Admin console/REST API - and typically a database driver on the Ranger classpath whose URL parameters permit code execution or unsafe initialization. Limiting factors: in standard deployments, creating or editing a service connection is an authenticated administrative action, so despite the official PR:N rating the practical prerequisite is access to a privileged configuration endpoint; the presence and version of exploitable JDBC drivers, and whether the injectable endpoint is exposed pre-authentication, are not confirmed from the available data and should be validated against the Apache advisory. Network reachability to the Ranger Admin interface is also required.

The official CVSS 3.1 vector (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H = 9.8) presents this as a network-reachable, unauthenticated, low-complexity full-impact RCE. However, the signals conflict: JDBC URL injection in Ranger realistically requires the ability to create or edit a service/datasource connection - an operation normally gated behind an authenticated admin session in the Ranger console/API - which argues for PR:L/PR:H rather than PR:N; verify the exact reachable endpoint with the Apache advisory before treating this as pre-auth. Supporting a more measured priority: EPSS is only 0.36% (29th percentile), the CVE is not listed in CISA KEV (no confirmed active exploitation), and no public exploit was identified, so this is currently a high-severity-by-CVSS issue without evidence of widespread opportunistic exploitation. Net assessment: patch promptly given the critical impact and the sensitivity of Ranger as a security control plane, but the real-world exploitation prerequisites (likely authenticated config access) meaningfully temper the 9.8 headline for well-segmented deployments.

An attacker with access to the Ranger Admin service-configuration workflow supplies a malicious JDBC connection URL (e.g., one abusing driver-specific parameters) and triggers a connection test or use of that datasource, causing the Ranger server to load attacker-influenced driver behavior and execute code on the host. Because Ranger governs authorization for downstream data platforms, code execution on the Ranger host can cascade into broader data-plane compromise. No public exploit was identified at time of analysis, so this scenario is derived from the vulnerability class rather than a released POC.