CVE-2026-18656 & CVE-2026-18657 - Issue with Kiro IDE and CLI - Executable Resolution from Untrusted Project Directory on Windows
Bulletin ID: 2026-074-AWS Scope: AWS Content Type: Important (requires attention) Publication Date: 08/04/2026 12:30 PM PDT Description: Kiro is an agentic IDE and command-line interface users install on their desktop. We identified CVE-2026-18656 and CVE-2026-18657, an issue where an uncontrolled search path element on Windows might allow an actor to execute arbitrary code via a maliciously crafted project directory containing a planted executable that is resolved before the system PATH when a local user opens the directory. Impacted versions: - Kiro IDE for Windows between versions 1.0.0 through 1.0.212 - Kiro CLI for Windows prior to v2.10.0 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
Kiro IDE and CLI for Windows contain a vulnerability where an uncontrolled search path element allows an attacker to execute arbitrary code by placing a malicious executable in a project directory. When a local user opens this directory, the malicious executable is resolved before the system PATH, leading to potential code execution. The affected versions are Kiro IDE from 1.0.0 up to and including 1.0.212, and Kiro CLI versions prior to 2.10.0. The vendor has released fixed versions: Kiro IDE 1.0.228 and Kiro CLI 2.10.0. No workaround exists, so users must upgrade to these versions or later to remediate the vulnerability.
Potential Impact
An attacker with the ability to place a malicious executable in a project directory can achieve arbitrary code execution when a local user opens that directory in the affected Kiro IDE or CLI on Windows. This can lead to compromise of the user's system under the context of the local user. The vulnerability arises from the search path resolution order prioritizing the project directory over the system PATH.
Mitigation Recommendations
Upgrade Kiro IDE to version 1.0.228 or later and Kiro CLI to version 2.10.0 or later. No workaround is available. Ensure any forked or derivative code is also patched to incorporate these fixes.
CVE-2026-18656 & CVE-2026-18657 - Issue with Kiro IDE and CLI - Executable Resolution from Untrusted Project Directory on Windows
Description
Bulletin ID: 2026-074-AWS Scope: AWS Content Type: Important (requires attention) Publication Date: 08/04/2026 12:30 PM PDT Description: Kiro is an agentic IDE and command-line interface users install on their desktop. We identified CVE-2026-18656 and CVE-2026-18657, an issue where an uncontrolled search path element on Windows might allow an actor to execute arbitrary code via a maliciously crafted project directory containing a planted executable that is resolved before the system PATH when a local user opens the directory. Impacted versions: - Kiro IDE for Windows between versions 1.0.0 through 1.0.212 - Kiro CLI for Windows prior to v2.10.0 Please refer to the article below for the most up-to-date and complete information related to this AWS Security Bulletin.
Affected software
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AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
Kiro IDE and CLI for Windows contain a vulnerability where an uncontrolled search path element allows an attacker to execute arbitrary code by placing a malicious executable in a project directory. When a local user opens this directory, the malicious executable is resolved before the system PATH, leading to potential code execution. The affected versions are Kiro IDE from 1.0.0 up to and including 1.0.212, and Kiro CLI versions prior to 2.10.0. The vendor has released fixed versions: Kiro IDE 1.0.228 and Kiro CLI 2.10.0. No workaround exists, so users must upgrade to these versions or later to remediate the vulnerability.
Potential Impact
An attacker with the ability to place a malicious executable in a project directory can achieve arbitrary code execution when a local user opens that directory in the affected Kiro IDE or CLI on Windows. This can lead to compromise of the user's system under the context of the local user. The vulnerability arises from the search path resolution order prioritizing the project directory over the system PATH.
Mitigation Recommendations
Upgrade Kiro IDE to version 1.0.228 or later and Kiro CLI to version 2.10.0 or later. No workaround is available. Ensure any forked or derivative code is also patched to incorporate these fixes.
Technical Details
- Classification
- {"confidence":0.88,"severitySource":"default","classifier":"rss-v2"}
- Article Source
- {"url":"https://aws.amazon.com/security/security-bulletins/rss/2026-074-aws/","fetched":true,"fetchedAt":"2026-08-04T19:45:17.890Z","wordCount":220}
Threat ID: 6a72414dbf8831d53957007c
Added to database: 08/04/2026, 19:45:17 UTC
Last enriched: 08/11/2026, 21:21:23 UTC
Last updated: 09/18/2026, 10:01:30 UTC
Views: 93
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