Executive Summary

PaperCut MF/NG database utilities instantiate driver classes from configurable names without allowlist, enabling arbitrary Java bytecode execution if attacker manipulates config. CVE-2026-82078 is actively exploited (CISA KEV).

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Authoritative CVE Metadata - CVSS Base Score: 9.1 (CRITICAL) - Published: 2026-08-28T16:18:31.240 - Last Modified: 2026-09-14T00:16:56.777

[!CAUTION] Known Exploited Vulnerability: YES (CISA KEV Added: 2026-08-31)

Original Description: An unsafe dynamic class loading vulnerability exists in the database connection utilities of PaperCut MF and PaperCut NG. The application instantiates database driver classes based on configurable driver names without validating against an allowlist of approved drivers. If an attacker can manipulate system configuration parameters, this enables the execution of arbitrary Java bytecode residing on the application classpath under the security context of the PaperCut server process.

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