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VULNERABILITIES

CVE-2026-82078 Details

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.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:9.1 CRITICALVector:CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

References to Advisories, Solutions, and Tools

By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.

URLSource(s)Tag(s)
https://github.com/rapid7/metasploit-framework/pull/21842 CISA-ADPIssue TrackingPatch
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-82078 CISA-ADPPatchThird Party AdvisoryUS Government Resource
https://www.papercut.com/kb/Main/security-bulletin-27-aug-2026-urgent-security-advisory/ PaperCutPatchVendor Advisory

This CVE is in CISA's Known Exploited Vulnerabilities Catalog

Reference CISA's BOD 22-01 and Known Exploited Vulnerabilities Catalog for further guidance and requirements.

Vulnerability NameDate AddedDue DateRequired Action
PaperCut NG/MF Unsafe Reflection VulnerabilityAug 31, 2026Sep 14, 2026Apply 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.

Weakness Enumeration

CWE-IDCWE NameSource
CWE-470Use of Externally-Controlled Input to Select Classes or Code ('Unsafe Reflection')PaperCut

Affected Products

ProductVersions
papercut papercut mf
< 24.1.9
>= 25.0.2, < 25.0.12
>= 26.0.2, < 26.0.4

CPE

  • cpe:2.3:a:papercut:papercut_mf:*:*:*:*:*:*:*:*

Remediation

  • No remediation found in references.
papercut papercut ng
< 24.1.9
>= 25.0.2, < 25.0.12
>= 26.0.2, < 26.0.4

CPE

  • cpe:2.3:a:papercut:papercut_ng:*:*:*:*:*:*:*:*

Remediation

  • No remediation found in references.

Change History

10 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2026-82078
NVD Published Date:
Aug 28, 2026
NVD Last Modified:
Sep 14, 2026
Source:
PaperCut
CVE-2026-82078 Details - Not Deferred