Issues in tough library and tuftool CLI utility
Bulletin ID: 2026-019-AWS Scope: AWS Content Type: Important (requires attention) Publication Date: 2026/04/24 13:30 AM PDT Description: Multiple security issues have been identified in the tough library and tuftool CLI utility. tough is a Rust library used for generating, signing, and managing TUF (The Update Framework) repositories, and tuftool is the command-line interface for repository management Operations. The following issues have been identified: - CVE-2026-6966 - CVE-2026-6967 - CVE-2026-6968 Impacted versions: - tough: versions 0.1.0 through 0.21.x (inclusive) - tuftool: versions 0.1.0 through 0.14.x (inclusive) Please refer to the article below for the most up-to-date and complete information related to this AWS Security Bulletin.
CSIRTS triage
- What
- Multiple security issues have been identified in the tough library and tuftool CLI utility.
- Who is affected
- Users of the tough library and tuftool CLI utility within the specified version ranges.
- Urgency
- Remediation is important due to the potential impact of the identified vulnerabilities.
- Action
- Update to versions beyond the specified ranges.
AI-assisted analysis generated from the source advisory — verify against the original.
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Details
Original advisory: https://aws.amazon.com/security/security-bulletins/rss/2026-019-aws/
Exploitation outlook
EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.
- Low exploitation riskCVE-2026-69660.26% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 18% of all scored CVEs.
- Low exploitation riskCVE-2026-69670.25% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 16% of all scored CVEs.
- Low exploitation riskCVE-2026-69680.52% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 41% of all scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2026-6966 | coverage & exploitation status | NVD · CVE.org |
| CVE-2026-6967 | coverage & exploitation status | NVD · CVE.org |
| CVE-2026-6968 | coverage & exploitation status | NVD · CVE.org |
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