CVE-2026-6966
Full vulnerability record from the local CVENow database.
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.
Severity
HIGH
CVSS score
7.0
(v4.0)
Vulnerability status
Modified
Source identifier
ff89ba41-3aa1-4d27-914a-91399e9639e5
Published
2026-04-24 20:16:28.883000
Last modified
2026-10-26 21:10:00.170000
View original CVE JSON
{
"id": "CVE-2026-6966",
"sourceIdentifier": "ff89ba41-3aa1-4d27-914a-91399e9639e5",
"published": "2026-04-24T20:16:28.883",
"lastModified": "2026-10-26T21:10:00.170",
"vulnStatus": "Modified",
"cveTags": [],
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"value": "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.\n\n\n\nWe recommend you upgrade to tough-v0.22.0 / tuftool-v0.15.0."
},
{
"lang": "es",
"value": "Verificación incorrecta de la unicidad de la firma criptográfica en la validación de roles delegados en awslabs/tough en versiones anteriores a la tough-v0.22.0 permite a usuarios remotos autenticados eludir el requisito del umbral de firma de TUF duplicando una firma válida, lo que provoca que el cliente acepte metadatos de roles delegados falsificados.\n\nSe recomienda actualizar a tough-v0.22.0 / tuftool-v0.15.0."
}
],
"affected": [
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"affectedData": [
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"defaultStatus": "unaffected",
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"lessThanOrEqual": "0.21",
"versionType": "custom",
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"exploitMaturity": "NOT_DEFINED",
"confidentialityRequirement": "NOT_DEFINED",
"integrityRequirement": "NOT_DEFINED",
"availabilityRequirement": "NOT_DEFINED",
"modifiedAttackVector": "NOT_DEFINED",
"modifiedAttackComplexity": "NOT_DEFINED",
"modifiedAttackRequirements": "NOT_DEFINED",
"modifiedPrivilegesRequired": "NOT_DEFINED",
"modifiedUserInteraction": "NOT_DEFINED",
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"modifiedSubIntegrityImpact": "NOT_DEFINED",
"modifiedSubAvailabilityImpact": "NOT_DEFINED",
"Safety": "NOT_DEFINED",
"Automatable": "NOT_DEFINED",
"Recovery": "NOT_DEFINED",
"valueDensity": "NOT_DEFINED",
"vulnerabilityResponseEffort": "NOT_DEFINED",
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