CVE-2026-82078

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 v3 9.1 CRITICAL

9.1^/10

CVSS v3 : CRITICAL

Vector :

Exploitability : 2.3 / Impact : 6.0

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required HIGH

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope CHANGED

References

Link	Resource
https://www.papercut.com/kb/Main/security-bulletin-27-aug-2026-urgent-security-advisory/	Patch Vendor Advisory
https://github.com/rapid7/metasploit-framework/pull/21842	Issue Tracking Patch
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-82078	Patch Third Party Advisory US Government Resource

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:papercut:papercut_mf::::::::
	cpe:2.3:a:papercut:papercut_mf::::::::
	cpe:2.3:a:papercut:papercut_mf::::::::
	cpe:2.3:a:papercut:papercut_ng::::::::
	cpe:2.3:a:papercut:papercut_ng::::::::
	cpe:2.3:a:papercut:papercut_ng::::::::

History

No history.

Information

Published : 2026-08-28 16:18

Updated : 2026-09-14 00:16

NVD link : CVE-2026-82078

Mitre link : CVE-2026-82078

CVE.ORG link : CVE-2026-82078

JSON object : View

Products Affected

papercut

papercut_mf
papercut_ng

CWE

CWE-470

Use of Externally-Controlled Input to Select Classes or Code ('Unsafe Reflection')

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