Medium severity5.3NVD Advisory· Published Apr 24, 2026· Updated May 6, 2026
CVE-2026-6966
CVE-2026-6966
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 packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
toughcrates.io | < 0.22.0 | 0.22.0 |
tuftoolcrates.io | < 0.15.0 | 0.15.0 |
Affected products
3Patches
0No patches discovered yet.
Vulnerability mechanics
AI mechanics synthesis has not run for this CVE yet.
References
9- aws.amazon.com/security/security-bulletins/2026-019-aws/nvdVendor Advisory
- github.com/advisories/GHSA-8m7c-8m39-rv4xghsaADVISORY
- github.com/awslabs/tough/security/advisories/GHSA-8m7c-8m39-rv4xnvdVendor AdvisoryWEB
- nvd.nist.gov/vuln/detail/CVE-2026-6966ghsaADVISORY
- aws.amazon.com/security/security-bulletins/2026-019-awsghsaWEB
- crates.io/crates/tough/0.22.0nvdProductWEB
- crates.io/crates/tuftool/0.15.0nvdProductWEB
- github.com/awslabs/tough/releases/tag/tough-v0.22.0nvdRelease NotesWEB
- github.com/awslabs/tough/releases/tag/tuftool-v0.15.0nvdRelease NotesWEB
News mentions
0No linked articles in our index yet.