high5.3
CVE-2026-6966
Improper verification of cryptographic signature uniqueness in delegated role validation in awslabs/tough before tough-v0.22.0 allows remote authenticated user…
Impact
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.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| rust | tough | < 0.22.0 | 0.22.0 |
| rust | tuftool | < 0.15.0 | 0.15.0 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Amazon | Tough | before 0.22.0 |
| Amazon | Tuftool | before 0.15.0 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-8m7c-8m39-rv4x
- https://github.com/awslabs/tough/security/advisories/GHSA-8m7c-8m39-rv4x
- https://nvd.nist.gov/vuln/detail/CVE-2026-6966
- https://aws.amazon.com/security/security-bulletins/2026-019-aws
- https://crates.io/crates/tough/0.22.0
- https://crates.io/crates/tuftool/0.15.0
- https://github.com/awslabs/tough/releases/tag/tough-v0.22.0
- https://github.com/awslabs/tough/releases/tag/tuftool-v0.15.0
- https://aws.amazon.com/security/security-bulletins/2026-019-aws/