CVE-2026-6968 Multiple Path Traversal Variants in awslabs/tough
Authenticated users with signing authority can write files outside intended directories via path traversal in the AWS TUF library.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-6968?
CVE-2026-6968 is a high-severity path traversal vulnerability in AWS tough, published on 24 Apr 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official 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.
Weakness: CWE-22
Which versions are affected by CVE-2026-6968?
It affects 2 products.
Products include Amazon Tough, Amazon Tuftool.
How do I fix CVE-2026-6968?
No fix has been published for CVE-2026-6968 yet. Limit exposure of the affected software until one is available.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2026-6968 being exploited?
There is no known exploitation of CVE-2026-6968 in the wild and no public exploit code.
Other vulnerabilities in AWS tough
- CVE-2020-15093 Improper verification of signature threshold in tough
- CVE-2021-41149 Improper sanitization of target names in tough
- CVE-2021-41150 Improper sanitization of delegated role names in tough
- CVE-2026-6967 Missing Delegated Metadata Validation in awslabs/tough
- CVE-2026-6966 Signature Threshold Bypass in awslabs/tough Delegated Roles
Sources
Also known as GHSA-v57p-gppj-p9vg.