---
id: CVE-2026-6968
title: Multiple Path Traversal Variants in awslabs/tough
summary: >-
  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_targ…
severity: medium
cvss: 5.9
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:L'
cvssSource: cna
cwe:
  - CWE-22
vendor: AWS
product: tough
affected:
  - tough < 0.22.0
  - tuftool < 0.15.0
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-04-24T20:09:33.745527Z'
published: '2026-04-24'
updated: '2026-10-20'
sourceUpdated: '2026-10-20T18:26:03.243Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-6968'
references:
  - url: 'https://aws.amazon.com/security/security-bulletins/2026-019-aws/'
  - url: 'https://github.com/awslabs/tough/releases/tag/tough-v0.22.0'
  - url: 'https://github.com/awslabs/tough/releases/tag/tuftool-v0.15.0'
  - url: 'https://crates.io/crates/tough/0.22.0'
  - url: 'https://crates.io/crates/tuftool/0.15.0'
  - url: 'https://github.com/awslabs/tough/security/advisories/GHSA-v57p-gppj-p9vg'
tags:
  - cve.org
epss: 0.00643
epssPercentile: 0.4993
ingestedAt: '2026-10-20T19:16:14.548Z'
---

## Overview

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.

## Affected

- `tough < 0.22.0`
- `tuftool < 0.15.0`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.