CVE-2026-8794: PaperCut Ng/mf

Medium severity, CVSS 6.9. EPSS: 0.7% chance of exploitation in the next 30 days.

PaperCut NG/MF contains an observable timing discrepancy in its authentication component. An unauthenticated remote attacker can exploit this vulnerability to perform username enumeration by measuring response times during login attempts. The system executes a password hash comparison only when a valid account is supplied, creating a measurable timing oracle that reveals account existence.

Affected products

• PaperCut PaperCut Ng/mf: before 26.0.3 (fixed in 26.0.3)

Published 2026-08-03. Last modified 2026-09-09.