CVE-2026-5429CWE-79

Kiro IDE Webview Cross-Site Scripting via Workspace Color Theme

High · published April 2, 2026

CVSS v4.0
7.1
EPSS
0%
Percentile
13.3
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v4.0
7.1 · HIGH
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
EPSS
0.00233 · 13.3th percentile
Weakness
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Published
2026-04-02T18:37Z
EPSS history
Timeline
  • 02 APR 18:37Z
    Kiro IDE Webview Cross-Site Scripting via Workspace Color Theme
    cvelistv5