Improper Verification of Cryptographic Signature Affecting tough package, versions <0.22.0
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-RUST-TOUGH-16301589
- published27 Apr 2026
- disclosed24 Apr 2026
- credit1seal
Introduced: 24 Apr 2026
NewCVE-2026-6966 (opens in a new tab)How to fix?
Upgrade tough to version 0.22.0 or higher.
Overview
tough is an Update Framework (TUF) repository client
Affected versions of this package are vulnerable to Improper Verification of Cryptographic Signature due to improper verification of cryptographic signature uniqueness in delegated role validation. An attacker can bypass signature threshold requirements by duplicating a valid signature, causing the client to accept forged delegated role metadata.