CVE-2026-6966: tough before 0.22.0 (exclusive), 0.9.0 through 0.21; +1 more affected products

CVE-2026-6966. CVSS 3.1 base score 6.5 (MEDIUM, NVD). EPSS 0.0037 (percentile 0.29461), scored 20-Oct-2026.

Affected technology

tough · before 0.22.0 (exclusive)
amazon

tuftool · before 0.15.0 (exclusive)
amazon

tough · 0.9.0 through 0.21
AWS

tuftool · 0 through 0.14
AWS

Description’s affected range: before tough-v0.22.0

Component: Not specified by the source

Attack conditions (Source advisory, CVSS 4.0): Network (remote) · Low privileges required · No user interaction required

What an attacker can do

Remote authenticated users can bypass the TUF signature threshold requirement by duplicating a valid signature, causing the client to accept forged delegated role metadata. Source advisory’s CVSS 4.0 assessment (base score 7.0/10) rates confidentiality and availability impact as none; integrity impact as high.

Published 20-Oct-2026 21:22 UTC

CWE: CWE-347
CCR priority: 26.1 /100 (P4)
CVSS 3.1: 6.5 /10 · CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N · NVD
EPSS: 0.0037 · percentile 0.29461 · 2026-10-20
KEV: no

Provenance

NVD CVE API 2.0 · Source record · observed 2026-10-20 21:22:07.084487+00:00 UTC

Stable permalink: https://cybercodered.org/item/cve-cve-2026-6966.html