CVE-2026-5429: Aws Kiro IDE

High severity, CVSS 7.8. EPSS: 0.2% chance of exploitation in the next 30 days.

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.

Affected products

• Aws Kiro IDE: from 0.1, before 0.8.140 (fixed in 0.8.140)

Published 2026-04-02. Last modified 2026-07-24.