# CVE-2026-6967

> Vulnerability · severity: **MEDIUM** (CVSS 5.9).

## Description

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.

## Key facts

- **CVE ID:** CVE-2026-6967
- **Published:** 2026-04-24
- **CVSS severity:** MEDIUM
- **CVSS base score:** 5.9
- **CWE codes:** CWE-345

## Affected products

- `amazon:tough`
- `amazon:tuftool`

## Primary sources

- NIST NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-6967

## Citation

> AI Analytics. CVE-2026-6967. Retrieved 2026-07-03 from https://api.ai-analytics.org/cve/CVE-2026-6967. Derived from NIST NVD. Licensed CC0.

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