PT-2026-42816 · Aws · Kiro Cli

Published 2026-05-22 · Updated 2026-05-22 · CVE-2026-9255

Mitre

CVSS v3.1

7.8

High

Base vector

AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Missing input source validation in the tool authorization prompt in Kiro CLI before 1.28.0 allows a local attacker to execute arbitrary tools, including shell commands, without user approval by crafting content that is piped to kiro-cli via stdin.

We recommend you to upgrade to kiro-cli version 1.28.0 or later.

Fix

Missing Authorization

Weakness Enumeration

CWE-862

Related Identifiers

CVE-2026-9255

Affected Products

Kiro Cli

References · 2

• https://aws.amazon.com/security/security-bulletins/2026-035-aws · Vendor Advisory
• https://kiro.dev/changelog/cli/1-28 · Note