CVE-2026-13769: CWE-732: Incorrect Permission Assignment for Critical Resource in AWS AWS CLI
Bulletin ID: 2026-049-AWS Scope: AWS Content Type: Important (requires attention) Publication Date: 07/01/2026 11:45 AM PDT Description: The AWS Command Line Interface (AWS CLI) is a unified tool for managing AWS services from the command line. We identified CVE-2026-13769 in AWS CLI on Unix-like systems where the umask has not been configured to restrict file permissions (the default on most systems) wrote credential and configuration files with world-readable permissions, which allows other local users on the same host to read credentials. Impacted versions: <=1.44.77 (v1) AND <=2.34.28 (v2) Please refer to the article below for the most up-to-date and complete information related to this AWS Security Bulletin.
AI Analysis
Technical Summary
This vulnerability (CWE-732) arises from incorrect permission assignment for critical resources in AWS CLI on Unix-like systems. Specifically, when the default umask does not restrict file permissions, credentials written by subcommands such as aws codeartifact login, aws iam create-virtual-mfa-device, and aws deploy register may be readable by other local users. This affects AWS CLI versions prior to 1.44.78 (v1) and 2.34.29 (v2). The CVSS 3.1 base score is 5.5 (medium severity), reflecting local attack vector with low complexity and no user interaction, impacting confidentiality but not integrity or availability. AWS has published an advisory and users are advised to upgrade to the fixed versions.
Potential Impact
The vulnerability allows local users on the same Unix-like host to read AWS credentials created by certain CLI subcommands due to overly permissive file permissions. This compromises confidentiality of credentials but does not affect integrity or availability. Exploitation requires local access and low privileges. No known exploits in the wild have been reported.
Mitigation Recommendations
A patch is available. Users should upgrade AWS CLI to version 1.44.78 (v1) or 2.34.29 (v2) or later to remediate this issue. Since this is a client-side tool, remediation is managed by the user upgrading their installed AWS CLI version. Refer to the official AWS security bulletin at https://aws.amazon.com/security/security-bulletins/2026-049-aws/ for detailed guidance.
CVE-2026-13769: CWE-732: Incorrect Permission Assignment for Critical Resource in AWS AWS CLI
Description
Bulletin ID: 2026-049-AWS Scope: AWS Content Type: Important (requires attention) Publication Date: 07/01/2026 11:45 AM PDT Description: The AWS Command Line Interface (AWS CLI) is a unified tool for managing AWS services from the command line. We identified CVE-2026-13769 in AWS CLI on Unix-like systems where the umask has not been configured to restrict file permissions (the default on most systems) wrote credential and configuration files with world-readable permissions, which allows other local users on the same host to read credentials. Impacted versions: <=1.44.77 (v1) AND <=2.34.28 (v2) Please refer to the article below for the most up-to-date and complete information related to this AWS Security Bulletin.
CVSS v3.1
Score 5.5medium
Affected software
AWS
AWS CLI
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CWE-732) arises from incorrect permission assignment for critical resources in AWS CLI on Unix-like systems. Specifically, when the default umask does not restrict file permissions, credentials written by subcommands such as aws codeartifact login, aws iam create-virtual-mfa-device, and aws deploy register may be readable by other local users. This affects AWS CLI versions prior to 1.44.78 (v1) and 2.34.29 (v2). The CVSS 3.1 base score is 5.5 (medium severity), reflecting local attack vector with low complexity and no user interaction, impacting confidentiality but not integrity or availability. AWS has published an advisory and users are advised to upgrade to the fixed versions.
Potential Impact
The vulnerability allows local users on the same Unix-like host to read AWS credentials created by certain CLI subcommands due to overly permissive file permissions. This compromises confidentiality of credentials but does not affect integrity or availability. Exploitation requires local access and low privileges. No known exploits in the wild have been reported.
Mitigation Recommendations
A patch is available. Users should upgrade AWS CLI to version 1.44.78 (v1) or 2.34.29 (v2) or later to remediate this issue. Since this is a client-side tool, remediation is managed by the user upgrading their installed AWS CLI version. Refer to the official AWS security bulletin at https://aws.amazon.com/security/security-bulletins/2026-049-aws/ for detailed guidance.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- AMZN
- Date Reserved
- 2026-06-29T20:24:05.617Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Is Cloud Service
- true
- Vendor Advisory Urls
- [{"url":"https://aws.amazon.com/security/security-bulletins/2026-049-aws/","vendor":"AWS"}]
Threat ID: 6a4568cf27e9c79719fe365b
Added to database: 07/01/2026, 19:21:51 UTC
Last enriched: 07/01/2026, 19:36:42 UTC
Last updated: 09/30/2026, 03:28:26 UTC
Views: 135
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