CVE-2026-9255

HIGH

Tool Execution Without Authorization via Piped Stdin in Kiro CLI

Title source: cna
STIX 2.1

Description

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.

References (2)

Core 2
Core References
Release Notes release-notes
https://kiro.dev/changelog/cli/1-28/

Scores

CVSS v3 7.8
EPSS 0.0015
EPSS Percentile 4.7%
Attack Vector LOCAL
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact total

Details

CWE
CWE-862
Status published
Products (2)
amazon/kiro_cli < 1.28.0
AWS/Kiro CLI < 1.28.0
Published May 22, 2026
Tracked Since May 22, 2026