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.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| AWS | tough | 0.9.0 – ≤ 0.21 | — |
| AWS | tuftool | ≤ 0.14 | — |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| crates.io | tough | < 0.22.0 | 0.22.0 | GHSA-8m7c-8m39-rv4x |
| crates.io | tuftool | < 0.15.0 | 0.15.0 | GHSA-8m7c-8m39-rv4x |
References
- https://aws.amazon.com/security/security-bulletins/2026-019-aws/ vendor-advisory
- https://github.com/awslabs/tough/releases/tag/tough-v0.22.0 patch
- https://github.com/awslabs/tough/releases/tag/tuftool-v0.15.0 patch
- https://crates.io/crates/tough/0.22.0 patch
- https://crates.io/crates/tuftool/0.15.0 patch
- https://github.com/awslabs/tough/security/advisories/GHSA-8m7c-8m39-rv4x third-party-advisory