{"id":"CVE-2026-5429","aliases":["EUVD-2026-18519","GHSA-7v7j-vpv5-h468"],"status":"published","title":"Kiro IDE Webview Cross-Site Scripting via Workspace Color Theme","description":"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.\n\nTo remediate this issue, users should upgrade to version 0.8.140.","severity":{"version":"4.0","score":7.1,"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","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.00164,"percentile":0.05645,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-79"],"published":"2026-04-02T18:37:42Z","modified":"2026-07-24T20:10:00Z","products":[{"vendor":"aws","product":"kiro ide"}],"references":[{"url":"https://aws.amazon.com/security/security-bulletins/2026-012-aws/","tags":["vendor-advisory"]},{"url":"https://kiro.dev/changelog/ide/0-8/#patch-0-8-140","tags":["release-notes"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-5429"},{"url":"https://aws.amazon.com/security/security-bulletins/2026-012-aws"},{"url":"https://github.com/advisories/GHSA-7v7j-vpv5-h468"}],"sources":{"cve":[{"id":"CVE-2026-5429","title":"Kiro IDE Webview Cross-Site Scripting via Workspace Color Theme","description":"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.\n\nTo remediate this issue, users should upgrade to version 0.8.140.","status":"published","published":"2026-04-02T18:37:42.972Z","modified":"2026-04-02T19:22:46.775Z","cvss":[{"version":"4.0","score":7.1,"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","level":"high","assessor":"cna"},{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high","assessor":"cna"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T13:39:27.849196Z"}],"euvd":[{"id":"EUVD-2026-18519","description":"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.\n\nTo remediate this issue, users should upgrade to version 0.8.140.","status":"published","published":"2026-04-02T18:37:42Z","modified":"2026-04-02T19:22:46Z","cvss":[{"version":"4.0","score":7.1,"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","level":"high"}],"updated_at":"2026-11-02T19:25:17.32175Z"}],"ghsa":[{"id":"GHSA-7v7j-vpv5-h468","title":"Unsanitized input during web page generation in the Kiro Agent webview in Kiro IDE before version...","description":"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.\n\nTo remediate this issue, users should upgrade to version 0.8.140.","status":"published","published":"2026-04-02T21:32:53Z","modified":"2026-04-02T21:33:03Z","cvss":[{"version":"4.0","score":7.1,"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","level":"high"},{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T15:07:07.867102Z"}],"nvd":[{"id":"CVE-2026-5429","description":"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.\n\nTo remediate this issue, users should upgrade to version 0.8.140.","status":"published","published":"2026-04-02T19:21:37.083Z","modified":"2026-07-24T20:10:00.147Z","cvss":[{"version":"4.0","score":7.1,"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","level":"high","assessor":"secondary"},{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high","assessor":"secondary"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:12:12.73929Z"}]}}