CVE-2026-9255 | THREATINT

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.

PUBLISHED Reserved 2026-05-21 | Published 2026-05-22 | Updated 2026-05-23 | Assigner AMZN

HIGH: 7.8CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

HIGH: 8.4CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Problem types

CWE-862: Missing Authorization

Product status

Default status

unaffected

Any version before 1.28.0

affected

References

kiro.dev/changelog/cli/1-28/ release-notes

aws.amazon.com/security/security-bulletins/2026-035-aws/ vendor-advisory

cve.org (CVE-2026-9255)

nvd.nist.gov (CVE-2026-9255)

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