CVSS 4.0
9.4 criticalCVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:HCVE-2026-82078
Critical (9.4) in PaperCut NG/MF. In CISA KEV since 2026-08-31. EPSS 63% chance of exploitation in the next 30 days.
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.
Severity
CVSS 3.1
9.1 criticalCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H- EPSS
- 63% chance of exploitation in the next 30 days; higher than 99% of CVEs (scores of 2026-10-31)
- CISA KEV
- listed 2026-08-31, due 2026-09-14
- CWE
- CWE-470
- Published
- Modified
- Record from
- the NVD, synced
Affected
- papercut:papercut_mf
- papercut:papercut_ng