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TI-2026-08131 Aliases CVE-2026-9255GHSA-cv6r-hx5v-c4m6

Tool Execution Without Authorization via Piped Stdin in Kiro CLI

Priority LOW 37CWE-862Published · Updated

Key facts

Attack vector
Local
Privileges required
None
User interaction
Active
Attack complexity
Low
Attack requirements
None
Impact type
Security bypass
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-862.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00119 1st percentileScored 2026-11-07
Fix Fixed Kiro CLI (AWS): 1.28.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
AWSKiro CLIbefore 1.28.01.28.0Patch availableCNA
  • Kiro CLI VendorAWS Affected before 1.28.0 Fixed in 1.28.0 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:amazon:kiro_cli:*:*:*:*:*:*:*:*before 1.28.0VulnerableAWS
  • cpe:2.3:a:amazon:kiro_cli:*:*:*:*:*:*:*:* Versions before 1.28.0 Vulnerable ·AWS

Remediation

  • Fix · CNA Kiro CLI (AWS) Fixed in 1.28.0

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-9255
  2. 2026-10-03 Alias added: GHSA-cv6r-hx5v-c4m6

References

Advisory 1

Other 1

  • TI-2026-15290 Executable Resolution from Untrusted Project Directory in Kiro CLI on Windows CVSS 4.0HIGH 8.5

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences