Vulnerability 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.
CVSS Score
CRITICAL
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Papercut | Papercut Mf | < 24.1.9 |
| Papercut | Papercut Ng | < 24.1.9 |
Related Weaknesses (CWE)
References
- https://www.papercut.com/kb/Main/security-bulletin-27-aug-2026-urgent-security-aPatchVendor Advisory
- https://github.com/rapid7/metasploit-framework/pull/21842Issue TrackingPatch
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-PatchThird Party AdvisoryUS Government Resource
FAQ
What is CVE-2026-82078?
CVE-2026-82078 is a vulnerability with a CVSS score of 9.1 (CRITICAL). 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 dri...
How severe is CVE-2026-82078?
CVE-2026-82078 has been rated CRITICAL with a CVSS base score of 9.1/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2026-82078?
Check the references section above for vendor advisories and patch information. Affected products include: Papercut Papercut Mf, Papercut Papercut Ng.