CVE-2026-82078 — PaperCut MF/NG: Unsafe Dynamic Class Loading in Database Connector

Description (CNA)

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.

Affected (CNA)

Vendor / product	Versions
PaperCut / PaperCut MF/NG	affected 0 before 24.1.10; affected 25.0.0 before 25.0.13; affected 26.0.0 before 26.0.5

CWE

CWE-470

References

https://www.papercut.com/kb/Main/security-bulletin-27-aug-2026-urgent-security-advisory/

ADP enrichment

CISA-ADP

No English description supplied.

https://github.com/rapid7/metasploit-framework/pull/21842
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-82078