PT-2026-42816 · Kiro Cli · Kiro Cli

Published 2026-05-22 · Updated 2026-06-09 · CVE-2026-9255

Positive Technologies (AI Summary)

CVSS v3.1

7.8

High

Base vector

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

Name of the Vulnerable Software and Affected Versions Kiro CLI versions prior to 1.28.0

Description Missing input source validation in the tool authorization prompt allows a local attacker to execute arbitrary tools, including shell commands, without user approval. This is achieved by crafting content that is piped to kiro-cli via stdin (standard input, a data stream used by programs to receive text input).

Recommendations Upgrade to version 1.28.0 or later.

Fix

Missing Authorization

Weakness Enumeration

CWE-862

Related Identifiers

CVE-2026-9255

Affected Products

Kiro Cli

References · 8

• https://nvd.nist.gov/vuln/detail/CVE-2026-9255 · Security Note
• https://aws.amazon.com/security/security-bulletins/2026-035-aws · Vendor Advisory
• https://twitter.com/TellersTech/status/2062781834497573141 · Twitter Post
• https://kiro.dev/changelog/cli/1-28 · Note
• https://reddit.com/r/tellerstech/comments/1txcpxo/ship_it_weekly_podcast_kiro_cli_approval_bypass · Reddit Post
• https://t.me/CVEtracker/54651 · Telegram Post
• https://reddit.com/r/kiroIDE/comments/1u17ead/cve20269255_in_kiro_cli_approval_bypass_via_piped · Reddit Post
• https://t.me/cveNotify/166009 · Telegram Post