CVE-2026-9255CWE-862

Tool Execution Without Authorization via Piped Stdin in Kiro CLI

High · published May 22, 2026

CVSS v4.0
8.4
EPSS
0%
Percentile
6.7
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v4.0
8.4 · HIGH
Vector
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
EPSS
0.00175 · 6.7th percentile
Weakness
CWE-862 · Missing Authorization
Published
2026-05-22T16:38Z
EPSS history
Timeline
  • 22 MAY 16:38Z
    Tool Execution Without Authorization via Piped Stdin in Kiro CLI
    cvelistv5