CVE-2026-18657: CWE-427: Uncontrolled Search Path Element in Amazon Kiro CLI
An uncontrolled search path element in Kiro CLI before version 2.10.0 on Windows might allow a remote unauthenticated actor to execute arbitrary code via a maliciously crafted project directory containing an executable that bypasses workspace trust protections when a local user starts Kiro CLI in the directory. To remediate this issue, users should upgrade to version 2.10.0 or higher.
AI Analysis
Technical Summary
This vulnerability (CWE-427) affects Amazon Kiro CLI versions before 2.10.0 on Windows. It arises from an uncontrolled search path element, enabling a remote unauthenticated actor to execute arbitrary code by crafting a project directory containing a malicious executable. When a local user launches Kiro CLI in this directory, the malicious code can bypass workspace trust protections. The vulnerability has a CVSS 3.1 base score of 7.8, indicating high severity. The vendor advisory recommends upgrading to version 2.10.0 or higher to remediate the issue.
Potential Impact
Successful exploitation allows remote unauthenticated attackers to execute arbitrary code with the privileges of the local user starting Kiro CLI. This can lead to full compromise of the affected system, including confidentiality, integrity, and availability impacts. The vulnerability bypasses workspace trust protections, increasing the risk of executing untrusted code.
Mitigation Recommendations
Users should upgrade Amazon Kiro CLI to version 2.10.0 or later, where this vulnerability is fixed. No other mitigation or temporary workaround is indicated in the vendor advisory. Patch status is confirmed by the vendor advisory at https://aws.amazon.com/security/security-bulletins/2026-074-aws/.
CVE-2026-18657: CWE-427: Uncontrolled Search Path Element in Amazon Kiro CLI
Description
An uncontrolled search path element in Kiro CLI before version 2.10.0 on Windows might allow a remote unauthenticated actor to execute arbitrary code via a maliciously crafted project directory containing an executable that bypasses workspace trust protections when a local user starts Kiro CLI in the directory. To remediate this issue, users should upgrade to version 2.10.0 or higher.
CVSS v3.1
Score 7.8high
Affected software
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CWE-427) affects Amazon Kiro CLI versions before 2.10.0 on Windows. It arises from an uncontrolled search path element, enabling a remote unauthenticated actor to execute arbitrary code by crafting a project directory containing a malicious executable. When a local user launches Kiro CLI in this directory, the malicious code can bypass workspace trust protections. The vulnerability has a CVSS 3.1 base score of 7.8, indicating high severity. The vendor advisory recommends upgrading to version 2.10.0 or higher to remediate the issue.
Potential Impact
Successful exploitation allows remote unauthenticated attackers to execute arbitrary code with the privileges of the local user starting Kiro CLI. This can lead to full compromise of the affected system, including confidentiality, integrity, and availability impacts. The vulnerability bypasses workspace trust protections, increasing the risk of executing untrusted code.
Mitigation Recommendations
Users should upgrade Amazon Kiro CLI to version 2.10.0 or later, where this vulnerability is fixed. No other mitigation or temporary workaround is indicated in the vendor advisory. Patch status is confirmed by the vendor advisory at https://aws.amazon.com/security/security-bulletins/2026-074-aws/.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- AMZN
- Date Reserved
- 2026-08-03T13:09:23.416Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
- Vendor Advisory Urls
- [{"url":"https://aws.amazon.com/security/security-bulletins/2026-074-aws/","vendor":"AWS"}]
Threat ID: 6a724791bf8831d5396138cb
Added to database: 08/04/2026, 20:12:01 UTC
Last enriched: 08/04/2026, 20:26:54 UTC
Last updated: 08/04/2026, 22:09:57 UTC
Views: 4
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