EUVD-2026-18519
GHSA-7v7j-vpv5-h468
CVSS Vector
CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Lifecycle Timeline
3Description
Unsanitized input during web page generation in the Kiro Agent webview in Kiro IDE before version 0.8.140 allows a remote unauthenticated threat actor to execute arbitrary code via a potentially damaging crafted color theme name when a local user opens the workspace. This issue requires the user to trust the workspace when prompted. To remediate this issue, users should upgrade to version 0.8.140.
Analysis
Arbitrary code execution in AWS Kiro IDE versions prior to 0.8.140 occurs when a local user opens a maliciously crafted workspace containing an unsanitized color theme name, exploiting improper neutralization of input during webview generation. The attack requires user interaction (trusting the workspace when prompted) and can deliver full system compromise with high confidentiality, integrity, and availability impact. …
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Remediation
Within 24 hours: Inventory all Kiro IDE installations and identify affected versions (< 0.8.140). Communicate to users that Kiro IDE use is restricted until patch availability is confirmed. …
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External POC / Exploit Code
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