Unrated severityNVD Advisory· Published May 22, 2026· Updated May 23, 2026
Tool Execution Without Authorization via Piped Stdin in Kiro CLI
CVE-2026-9255
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.
Affected products
1Patches
0No patches discovered yet.
Vulnerability mechanics
AI mechanics synthesis has not run for this CVE yet.
References
2- aws.amazon.com/security/security-bulletins/2026-035-aws/mitrevendor-advisory
- kiro.dev/changelog/cli/1-28/mitrerelease-notes
News mentions
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