CVE-2026-6966

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Source
https://cve.org/CVERecord?id=CVE-2026-6966
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-6966.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-6966
Aliases
Related
Published
2026-04-24T19:38:24.907Z
Modified
2026-08-12T03:51:28.213734542Z
Severity
  • 7.0 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:H/SA:N CVSS Calculator
Summary
Signature Threshold Bypass in awslabs/tough Delegated Roles
Details

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.

Database specific 
{
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/6xxx/CVE-2026-6966.json",
    "cwe_ids": [
        "CWE-347"
    ],
    "cna_assigner": "AMZN"
}
References

Affected packages

Git / github.com/awslabs/tough

Affected ranges

Type
GIT
Repo
https://github.com/awslabs/tough
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
606dc87a8456c8f6e24c4a85e12b280cf2c9ca00
Database specific
Show details 
{
    "source": [
        "DESCRIPTION",
        "CPE_RANGE",
        "REFERENCES"
    ],
    "cpe": [
        "cpe:2.3:a:amazon:tough:*:*:*:*:*:rust:*:*",
        "cpe:2.3:a:amazon:tuftool:*:*:*:*:*:rust:*:*"
    ],
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "tough-v0.22.0"
        },
        {
            "fixed": "0.22.0"
        },
        {
            "fixed": "0.15.0"
        }
    ]
}

Affected versions

olpc-cjson-v0.*
olpc-cjson-v0.1.0
olpc-cjson-v0.1.1
olpc-cjson-v0.1.2
olpc-cjson-v0.1.3
olpc-cjson-v0.1.4
tough-kms-v0.*
tough-kms-v0.1.0
tough-kms-v0.1.1
tough-kms-v0.10.0
tough-kms-v0.11.0
tough-kms-v0.12.0
tough-kms-v0.13.0
tough-kms-v0.3.1
tough-kms-v0.3.2
tough-kms-v0.3.3
tough-kms-v0.3.4
tough-kms-v0.3.6
tough-kms-v0.4.0
tough-kms-v0.4.1
tough-kms-v0.4.2
tough-kms-v0.5.0
tough-kms-v0.6.0
tough-kms-v0.7.0
tough-kms-v0.8.0
tough-kms-v0.9.0
tough-ssm-v0.*
tough-ssm-v0.1.0
tough-ssm-v0.10.0
tough-ssm-v0.11.0
tough-ssm-v0.12.0
tough-ssm-v0.13.0
tough-ssm-v0.14.0
tough-ssm-v0.15.0
tough-ssm-v0.16.0
tough-ssm-v0.2.0
tough-ssm-v0.3.0
tough-ssm-v0.4.0
tough-ssm-v0.6.1
tough-ssm-v0.6.2
tough-ssm-v0.6.3
tough-ssm-v0.6.4
tough-ssm-v0.6.6
tough-ssm-v0.7.0
tough-ssm-v0.7.1
tough-ssm-v0.7.2
tough-ssm-v0.8.0
tough-ssm-v0.9.0
tough-v0.*
tough-v0.1.0
tough-v0.11.1
tough-v0.11.2
tough-v0.11.3
tough-v0.12.0
tough-v0.12.2
tough-v0.12.3
tough-v0.12.4
tough-v0.12.5
tough-v0.13.0
tough-v0.14.0
tough-v0.15.0
tough-v0.16.0
tough-v0.17.0
tough-v0.17.1
tough-v0.18.0
tough-v0.19.0
tough-v0.2.0
tough-v0.20.0
tough-v0.21.0
tough-v0.3.0
tough-v0.4.0
tough-v0.5.0
tough-v0.6.0
tough-v0.7.0
tough-v0.8.0
tough-v0.9.0
tuftool-v0.*
tuftool-v0.1.0
tuftool-v0.1.1
tuftool-v0.10.0
tuftool-v0.10.1
tuftool-v0.10.2
tuftool-v0.10.3
tuftool-v0.11.0
tuftool-v0.11.1
tuftool-v0.12.0
tuftool-v0.13.0
tuftool-v0.14.0
tuftool-v0.2.0
tuftool-v0.3.0
tuftool-v0.4.0
tuftool-v0.4.1
tuftool-v0.5.0
tuftool-v0.6.2
tuftool-v0.6.3
tuftool-v0.6.4
tuftool-v0.7.0
tuftool-v0.7.2
tuftool-v0.8.0
tuftool-v0.8.1
tuftool-v0.8.2
tuftool-v0.9.0

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-6966.json"