CVE-2026-6968: CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') in AWS tough
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.
AI Analysis
Technical Summary
This vulnerability (CWE-22) in AWS tough before version 0.22.0 involves improper limitation of pathnames, enabling remote authenticated users with delegated signing authority to write files outside intended output directories. The flaw is due to incomplete path traversal fixes where absolute target names and symlinked directories or metadata filenames are trusted without post-resolution containment verification. This can lead to unauthorized file writes outside designated directories. AWS has released tough-v0.22.0 and tuftool-v0.15.0 to fix this issue.
Potential Impact
The vulnerability allows remote authenticated users with delegated signing authority to write files outside the intended output directories, potentially leading to unauthorized file modification or creation. The impact is limited to integrity (high) and availability (low) as per the CVSS vector, with no confidentiality impact reported. There are no known exploits in the wild at this time.
Mitigation Recommendations
A patch is available. AWS recommends upgrading to tough version 0.22.0 or tuftool version 0.15.0 to remediate this vulnerability. Since this is a cloud service, AWS manages remediation for the hosted service; users should verify they are using updated versions or confirm with AWS advisory at https://aws.amazon.com/security/security-bulletins/2026-019-aws/ for current status and guidance.
CVE-2026-6968: CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') in AWS tough
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.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CWE-22) in AWS tough before version 0.22.0 involves improper limitation of pathnames, enabling remote authenticated users with delegated signing authority to write files outside intended output directories. The flaw is due to incomplete path traversal fixes where absolute target names and symlinked directories or metadata filenames are trusted without post-resolution containment verification. This can lead to unauthorized file writes outside designated directories. AWS has released tough-v0.22.0 and tuftool-v0.15.0 to fix this issue.
Potential Impact
The vulnerability allows remote authenticated users with delegated signing authority to write files outside the intended output directories, potentially leading to unauthorized file modification or creation. The impact is limited to integrity (high) and availability (low) as per the CVSS vector, with no confidentiality impact reported. There are no known exploits in the wild at this time.
Mitigation Recommendations
A patch is available. AWS recommends upgrading to tough version 0.22.0 or tuftool version 0.15.0 to remediate this vulnerability. Since this is a cloud service, AWS manages remediation for the hosted service; users should verify they are using updated versions or confirm with AWS advisory at https://aws.amazon.com/security/security-bulletins/2026-019-aws/ for current status and guidance.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- AMZN
- Date Reserved
- 2026-04-24T16:15:48.228Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
- Is Cloud Service
- true
- Vendor Advisory Urls
- [{"url":"https://aws.amazon.com/security/security-bulletins/2026-019-aws/","vendor":"AWS"}]
Threat ID: 69ebcd2c87115cfb686cfc1c
Added to database: 4/24/2026, 8:06:04 PM
Last enriched: 4/24/2026, 8:21:01 PM
Last updated: 4/24/2026, 10:15:24 PM
Views: 6
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