# tough cyclic delegation graphs are not detected

Source: https://junglewise.ai/threats/tough-cyclic-delegation-graphs-are-not-detected-8423c397  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2025-03-28  
License: CC BY 4.0 with a link back

Severity: low · CVSS 3.1 · Published 2025-03-28

tough cyclic delegation graphs are not detected

Technologies: [tough (crates.io)](https://junglewise.ai/threats/technologies/crates-io-tough). Vendors: [crates.io](https://junglewise.ai/threats/vendors/crates-io).

## Quick answers

**Is This vulnerability exploited in the wild?** No. Junglewise Threat Intelligence has no report of This vulnerability being exploited in the wild.

**How severe is This vulnerability?** Low severity, with a CVSS score of 3.1, published 28 March 2025.

**Which products and versions are affected?** tough (crates.io) SEMVER:introduced=0,fixed=0.20.0.

**Is there a fix for This vulnerability?** Yes. tough (crates.io): upgrade to 0.20.0 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**Am I affected?** Check whether you run tough (crates.io) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- tough (crates.io): upgrade to 0.20.0 or later

  ```sh
  cargo update -p tough
  ```


## Affected products

- tough (crates.io) SEMVER:introduced=0,fixed=0.20.0

## Related threats

- [awslabs/tough is Missing Delegated Metadata Validation](https://junglewise.ai/threats/cve-2026-6967-awslabs-tough-is-missing-delegated-metadata-validation)
- [awslabs/tough Delegated Roles have a Signature Threshold Bypass](https://junglewise.ai/threats/cve-2026-6966-aws-tough-and-tuftool-multiple-vulnerabilities-in-tuf)
- [tough terminating targets role delegations are not respected](https://junglewise.ai/threats/cve-2025-2886-tough-terminating-targets-role-delegations-are-not-respected)
- [tough root metadata version is not checked for sequential versioning](https://junglewise.ai/threats/cve-2025-2885-tough-root-metadata-version-is-not-checked-for-sequential)
- [tough timestamp metadata is cached when it fails snapshot rollback check](https://junglewise.ai/threats/cve-2025-2888-tough-timestamp-metadata-is-cached-when-it-fails-snapshot-rollback)