CVE-2026-6968

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.

CVSS v3.1 Score

5.9

MEDIUM

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:L

EPSS — Exploit Prediction

0.0008

Probability of exploitation

0.23%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-22 Path Traversal

Affected Products

Vendor	Product	Versions
amazon	tough	0.9.0 — 0.22.0
amazon	tuftool	< 0.15.0

References

Advisories & Patches

https://aws.amazon.com/security/security-bulletins/2026-019-aws/ https://github.com/awslabs/tough/security/advisories/GHSA-v57p-gppj-p9vg

Other References

https://crates.io/crates/tough/0.22.0 https://crates.io/crates/tuftool/0.15.0 https://github.com/awslabs/tough/releases/tag/tough-v0.22.0 https://github.com/awslabs/tough/releases/tag/tuftool-v0.15.0

Frequently Asked Questions

What is CVE-2026-6968? +

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. It has a CVSS v3.1 base score of 5.9 (MEDIUM).

How severe is CVE-2026-6968? +

CVE-2026-6968 has a CVSS v3.1 score of 5.9 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance. The EPSS score is 0.0008, placing it in the 0th percentile for exploitation probability.

What products are affected by CVE-2026-6968? +

CVE-2026-6968 affects products from amazon, specifically: tough, tuftool. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2026-6968? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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