Uncontrolled Search Path Vulnerability in Kiro CLI by Kiro
CVE-2026-18657

8.5HIGH

Key Information:

Vendor

Amazon

Status
Kiro Cli
Vendor
CVE Published:
4 August 2026

What is CVE-2026-18657?

An uncontrolled search path element vulnerability in Kiro CLI prior to version 2.10.0 on Windows allows remote unauthenticated attackers to execute arbitrary code. This is facilitated through a maliciously crafted project directory containing an executable, which can bypass workspace trust protections when a local user starts Kiro CLI within that directory. Users are strongly advised to upgrade to version 2.10.0 or higher to mitigate this risk.

Affected Version(s)

Kiro CLI 0 < 2.10.0

References

https://kiro.dev/changelog/cli/2-10/
release-notespatch
https://aws.amazon.com/security/security-bulletins/2026-0...
vendor-advisory

CVSS V4

Score:
8.5
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Local
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
Unknown

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Compass Security
.