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

> CVE-2026-82078: PaperCut MF/NG: Unsafe Dynamic Class Loading in Database Connector. CVSS 9.1 (CVSS 3.1), in CISA KEV.

Canonical: https://rewindex.com/cve/CVE-2026-82078
Last updated: 2026-09-14T00:16:56Z

- Published: 2026-08-28 11:45 UTC · Updated: 2026-09-14 00:16 UTC · Assigner: PaperCut
- CVSS: 9.1 (CVSS 3.1) · Severity: Critical · Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
- EPSS: 60.9%, 99th percentile (scored 2026-10-25)
- CISA KEV: yes, added 2026-08-31, federal due date 2026-09-14, ransomware use: Unknown
- CWE: CWE-470

## 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.

## CISA required action

Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.

## Affected vendors and products

- PaperCut: PaperCut MF/NG

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2026-82078)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2026-82078)
- [https://www.papercut.com/kb/Main/security-bulletin-27-aug-2026-urgent-security-advisory/](https://www.papercut.com/kb/Main/security-bulletin-27-aug-2026-urgent-security-advisory/)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2026-82078 · Markdown: https://rewindex.com/cve/CVE-2026-82078.md · JSON: https://rewindex.com/api/v1/cves/CVE-2026-82078 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T03:11:50.353Z