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.
Metrics
CVSS 3.1 9.1/10
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:HWeakness enumeration
Affected software
| Vendor | Product | Versions |
|---|---|---|
| PaperCut | PaperCut MF/NG | < 24.1.10; >= 25.0.0, < 25.0.13; >= 26.0.0, < 26.0.5 |
References
- https://www.papercut.com/kb/Main/security-bulletin-27-aug-2026-urgent-security-advisory/Patch, Vendor Advisory
- https://github.com/rapid7/metasploit-framework/pull/21842Issue Tracking, Patch
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-82078Patch, Third Party Advisory, US Government Resource
Timeline
- Published
- Aug 28, 2026
- Last modified
- Sep 14, 2026
- Added to CISA KEV
- Aug 31, 2026
- NVD status
- Analyzed