CVE-2026-82078
PaperCut MF/NG: Unsafe Dynamic Class Loading in Database Connector
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.
INFO
Published Date :
Aug. 28, 2026, 4:18 p.m.
Last Modified :
Aug. 28, 2026, 4:18 p.m.
Remotely Exploit :
Yes !
Source :
eb41dac7-0af8-4f84-9f6d-0272772514f4
Affected Products
The following products are affected by CVE-2026-82078
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 4.0 | CRITICAL | eb41dac7-0af8-4f84-9f6d-0272772514f4 | ||||
| CVSS 4.0 | CRITICAL | eb41dac7-0af8-4f84-9f6d-0272772514f4 |
Solution
- Update PaperCut MF and NG to the latest version.
- Configure database driver instantiation with an allowlist.
- Validate system configuration parameters regularly.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-82078.
| URL | Resource |
|---|---|
| https://www.papercut.com/kb/Main/security-bulletin-27-aug-2026-urgent-security-advisory/ |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-82078 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-82078
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-82078 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-82078 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
New CVE Received by eb41dac7-0af8-4f84-9f6d-0272772514f4
Aug. 28, 2026
Action Type Old Value New Value Added 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. Added CVSS V4.0 AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Added CWE CWE-470 Added Affected New affected value received. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/82xxx/CVE-2026-82078.json">CVE-2026-82078</a> Added Reference https://www.papercut.com/kb/Main/security-bulletin-27-aug-2026-urgent-security-advisory/