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CVE-2026-6967

Missing Delegated Metadata Validation in awslabs/tough

Missing expiration, hash, and length enforcement in delegated metadata validation in awslabs/tough before tough-v0.22.0 allows remote authenticated users with delegated signing authority to bypass TUF specification integrity checks for delegated targets metadata and poison the local metadata cache, because load_delegations does not apply the same validation checks as the top-level targets metadata path. We recommend you upgrade to tough-v0.22.0 / tuftool-v0.15.0.

CVSS 4.0 · 7.1 High EPSS < 1% KEV · Not listed
Vendors
Amazon Aws
Products
Tough Tuftool Tough and 1 more
CVE-2026-6968

Multiple Path Traversal Variants in awslabs/tough

Incomplete path traversal fixes in awslabs/tough before tough-v0.22.0 allow remote authenticated users with delegated signing authority to write files outside intended output directories via absolute target names in copy_target/link_target, symlinked parent directories in save_target, or symlinked metadata filenames in SignedRole::write, because write paths trust the joined destination path without post-resolution containment verification. We recommend you upgrade to tough-v0.22.0 / tuftool-v0.15.0.

CVSS 4.0 · 7.1 High EPSS < 1% KEV · Not listed
Vendors
Amazon Aws
Products
Tough Tuftool Tough and 1 more
CVE-2026-6966

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.

CVSS 4.0 · 7 High EPSS < 1% KEV · Not listed
Vendors
Amazon Aws
Products
Tough Tuftool Tough and 1 more