CVE-2026-18657Hinoki check available

User-assisted code execution via project-local executable precedence

Published Aug 4, 2026 · Updated Aug 4, 2026

Uncontrolled executable search in Amazon Web Services Kiro CLI before 2.10.0 allows remote attackers to execute code on Windows. Kiro CLI resolves a planted executable in an untrusted project directory before the matching executable on the system PATH, bypassing workspace trust protections. When a local user starts Kiro CLI in the crafted directory, the attacker gains code execution with that user's privileges.

CVSS severity8.5
High
EPSS probability0.17%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Uncontrolled executable search in Amazon Web Services Kiro CLI before 2.10.0 allows remote attackers to execute code on Windows. Kiro CLI resolves a planted executable in an untrusted project directory before the matching executable on the system PATH, bypassing workspace trust protections. When a local user starts Kiro CLI in the crafted directory, the attacker gains code execution with that user's privileges.

The record

CVE
CVE-2026-18657
Published
Aug 4, 2026
Updated
Aug 4, 2026
Vendor
Amazon Web Services
Product
Kiro CLI
Classifications
CWE-427, CAPEC-471, T1574.008
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 4, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <2.10.0

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Amazon Web Services · Kiro CLIversion=0 <2.10.0

Published CVSS scores

8.5AmazonCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
7.8AmazonCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-427Uncontrolled Search Path Element
CAPEC-471Search Order Hijacking
T1574.008Path Interception by Search Order Hijacking

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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