What is CVE-2026-18657?

CVE-2026-18657 is a high-severity vulnerability in Amazon Kiro Cli, classified under Uncontrolled Search Path Element. CVSS score: 7.8/10. Published 2026-08-04.

How severe is CVE-2026-18657?

High severity. CVSS v3 base score is 7.8 out of 10.

Vulnerability in Amazon Kiro Cli

CVE-2026-18657

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 worksp…

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

Affected products

Amazon Kiro Cli — versions 0

Weakness classification (CWE)

CWE-427 — Uncontrolled Search Path Element

References

ff89ba41-3aa1-4d27-914a-91399e9639e5 (vendor-advisory)
ff89ba41-3aa1-4d27-914a-91399e9639e5 (release-notes, patch)

Frequently asked questions

What is CVE-2026-18657?: CVE-2026-18657 is a high-severity vulnerability in Amazon Kiro Cli, classified under Uncontrolled Search Path Element. CVSS score: 7.8/10. Published 2026-08-04.
How severe is CVE-2026-18657?: High severity. CVSS v3 base score is 7.8 out of 10.