Is CVE-2026-6966 actively exploited?

No active exploitation of CVE-2026-6966 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-6966 be exploited remotely?

Yes. CVE-2026-6966 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-6966?

CVE-2026-6966 has a CVSS score of 5.3 (MEDIUM).

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MEDIUM

CVE-2026-6966

CWE-347Published: April 24, 2026· Updated: Apr 27, 2026

5.3

CVSS v3.1

EPSS:0.03%probability of exploitation in 30 daysPercentile:6.9th

Official Description

Improper verification of cryptographic signature uniqueness in delegated role validation in awslabs/tough before tough-v0.22.0 allows remote authenticated users to bypass the TUF signature threshold requirement by duplicating a valid signature, causing the client to accept forged delegated role metadata.

We recommend you upgrade to tough-v0.22.0 / tuftool-v0.15.0.

NVD Source

Technical Analysis

CVE-2026-6966 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in full integrity compromise (data manipulation), with a CVSS base score of 5.3.