CVE-2020-15093: Amazon Tough

High severity, CVSS 8.6. EPSS: 1.4% chance of exploitation in the next 30 days.

The tough library (Rust/crates.io) prior to version 0.7.1 does not properly verify the threshold of cryptographic signatures. It allows an attacker to duplicate a valid signature in order to circumvent TUF requiring a minimum threshold of unique signatures before the metadata is considered valid. A fix is available in version 0.7.1. CVE-2020-6174 is assigned to the same vulnerability in the TUF reference implementation.

Affected products

• Amazon Tough: before 0.7.1 (fixed in 0.7.1)

Published 2020-07-09. Last modified 2026-06-17.