Name: CVE-2026-8793: Improper Restriction of Excessive Authentication Attempts
Creator: Rapid7
Published: 2026-08-03T00:00:00.000Z
License: https://www.rapid7.com/legal/website-terms-of-use/
Keywords: CVE, CVE-2026-8793, CWE-307, CVSS 6.9, EPSS 0.00683

PaperCut NG/MF does not properly restrict excessive authentication attempts within its login component. An unauthenticated remote attacker can exploit this vulnerability to perform unrestricted brute-force or credential-stuffing attacks without triggering account lockout or rate-limiting mechanisms in some configurations.

CVSS Details

CVSS 4.0 Base Score: 6.9 (MEDIUM)
CVSS 4.0 Vector: (CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:L/SI:N/SA:N/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)

Covered by Rapid7

Product	Vendor Advisory	Solution File	Added	Published
Papercut Mf	—	Upgrade PaperCut MF to the latest version	Aug 4, 2026	Aug 3, 2026
Papercut Ng	—	Upgrade PaperCut NG to the latest version	Aug 4, 2026	Aug 3, 2026

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CVSS Details

Covered by Rapid7

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