CVE-2026-9255

8.4 highEPSS 0.1%

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.

Severity

CVSS 4.0

8.4 high

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

CVSS 3.1

7.8 high

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

EPSS: 0.1% chance of exploitation in the next 30 days; higher than 1% of CVEs (scores of 2026-10-31)
CWE: CWE-862
Published: 2026-05-22
Modified: 2026-07-23
Record from: the NVD, synced 2026-10-19

Affected

amazon:kiro_cli

References

https://aws.amazon.com/security/security-bulletins/2026-035-aws/
https://kiro.dev/changelog/cli/1-28/

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