Signature Threshold Bypass in awslabs/tough Delegated Roles
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.
CVE-2026-6966
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-6966
tough
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
tuftool
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"vendor": "AWS",
"product": "tough",
"versions": [
{
"status": "affected",
"version": "0.9.0",
"versionType": "custom",
"lessThanOrEqual": "0.21"
}
],
"defaultStatus": "unaffected"
},
{
"vendor": "AWS",
"product": "tuftool",
"versions": [
{
"status": "affected",
"version": "0",
"versionType": "custom",
"lessThanOrEqual": "0.14"
}
],
"defaultStatus": "unaffected"
}
]- Related CVEs
- CVE-2026-6966
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #42478 · Revision 1
- Added to Heist Feed
- Publisher date