Path traversal in tough - CVE-2026-6968
Published: April 25, 2026
Vulnerability identifier: #VU127899
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-6968
CWE-ID: CWE-22
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Amazon Web Services
Affected software:
tough
tough
Detailed vulnerability description
The vulnerability allows a remote user to write files outside intended output directories.
The vulnerability exists due to path traversal in copy_target, link_target, save_target, and SignedRole::write when processing repository-controlled target names, parent directories, and metadata filenames. A remote user can supply crafted repository metadata and target paths to write files outside intended output directories.
Exploitation requires delegated signing authority in the remote repository.
How to mitigate CVE-2026-6968
Install security update from vendor's website.