CVE-2026-5429

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-5429", "assignerOrgId": "ff89ba41-3aa1-4d27-914a-91399e9639e5", "state": "PUBLISHED", "assignerShortName": "AMZN", "dateReserved": "2026-04-02T15:46:40.727Z", "datePublished": "2026-04-02T18:37:42.972Z", "dateUpdated": "2026-04-02T19:22:46.775Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "ff89ba41-3aa1-4d27-914a-91399e9639e5", "shortName": "AMZN", "dateUpdated": "2026-04-02T18:39:49.328Z"}, "title": "Kiro IDE Webview Cross-Site Scripting via Workspace Color Theme", "problemTypes": [{"descriptions": [{"lang": "en", "cweId": "CWE-79", "description": "CWE-79 Improper neutralization of input during web page generation ('cross-site scripting')", "type": "CWE"}]}], "impacts": [{"capecId": "CAPEC-63", "descriptions": [{"lang": "en", "value": "CAPEC-63 Cross-Site Scripting (XSS)"}]}], "affected": [{"vendor": "AWS", "product": "Kiro IDE", "versions": [{"status": "affected", "version": "0.1", "lessThan": "0.8.140", "versionType": "custom"}], "defaultStatus": "unaffected"}], "descriptions": [{"lang": "en", "value": "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.", "supportingMedia": [{"type": "text/html", "base64": false, "value": "<p>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 <span>potentially damaging</span> crafted color theme name when a local user opens the workspace. This issue requires the user to trust the workspace when prompted.</p><p>To remediate this issue, users should upgrade to version 0.8.140.</p>"}]}], "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"]}], "metrics": [{"format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}], "cvssV3_1": {"version": "3.1", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH", "baseSeverity": "HIGH", "baseScore": 7.8, "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H"}}, {"format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}], "cvssV4_0": {"attackVector": "LOCAL", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "privilegesRequired": "NONE", "userInteraction": "ACTIVE", "vulnConfidentialityImpact": "HIGH", "subConfidentialityImpact": "NONE", "vulnIntegrityImpact": "HIGH", "subIntegrityImpact": "NONE", "vulnAvailabilityImpact": "HIGH", "subAvailabilityImpact": "NONE", "exploitMaturity": "NOT_DEFINED", "Safety": "NOT_DEFINED", "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "version": "4.0", "baseSeverity": "HIGH", "baseScore": 7.1, "vectorString": "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"}}], "source": {"discovery": "UNKNOWN"}, "x_generator": {"engine": "Vulnogram 1.0.1"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-04-02T19:17:32.056447Z", "id": "CVE-2026-5429", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-04-02T19:22:46.775Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-5429", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2026-04-02T19:17:32.056447Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-04-02T19:22:33.408Z"}}], "cna": {"title": "Kiro IDE Webview Cross-Site Scripting via Workspace Color Theme", "source": {"discovery": "UNKNOWN"}, "impacts": [{"capecId": "CAPEC-63", "descriptions": [{"lang": "en", "value": "CAPEC-63 Cross-Site Scripting (XSS)"}]}], "metrics": [{"format": "CVSS", "cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.8, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "REQUIRED", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "scenarios": [{"lang": "en", "value": "GENERAL"}]}, {"format": "CVSS", "cvssV4_0": {"Safety": "NOT_DEFINED", "version": "4.0", "Recovery": "NOT_DEFINED", "baseScore": 7.1, "Automatable": "NOT_DEFINED", "attackVector": "LOCAL", "baseSeverity": "HIGH", "valueDensity": "NOT_DEFINED", "vectorString": "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", "exploitMaturity": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "userInteraction": "ACTIVE", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "privilegesRequired": "NONE", "subIntegrityImpact": "NONE", "vulnIntegrityImpact": "HIGH", "subAvailabilityImpact": "NONE", "vulnAvailabilityImpact": "HIGH", "subConfidentialityImpact": "NONE", "vulnConfidentialityImpact": "HIGH", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "scenarios": [{"lang": "en", "value": "GENERAL"}]}], "affected": [{"vendor": "AWS", "product": "Kiro IDE", "versions": [{"status": "affected", "version": "0.1", "lessThan": "0.8.140", "versionType": "custom"}], "defaultStatus": "unaffected"}], "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"]}], "x_generator": {"engine": "Vulnogram 1.0.1"}, "descriptions": [{"lang": "en", "value": "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.", "supportingMedia": [{"type": "text/html", "value": "<p>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 <span>potentially damaging</span> crafted color theme name when a local user opens the workspace. This issue requires the user to trust the workspace when prompted.</p><p>To remediate this issue, users should upgrade to version 0.8.140.</p>", "base64": false}]}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-79", "description": "CWE-79 Improper neutralization of input during web page generation ('cross-site scripting')"}]}], "providerMetadata": {"orgId": "ff89ba41-3aa1-4d27-914a-91399e9639e5", "shortName": "AMZN", "dateUpdated": "2026-04-02T18:39:49.328Z"}}}, "cveMetadata": {"cveId": "CVE-2026-5429", "state": "PUBLISHED", "dateUpdated": "2026-04-02T19:22:46.775Z", "dateReserved": "2026-04-02T15:46:40.727Z", "assignerOrgId": "ff89ba41-3aa1-4d27-914a-91399e9639e5", "datePublished": "2026-04-02T18:37:42.972Z", "assignerShortName": "AMZN"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Kiro IDE", "vendor": "AWS", "versions": [{"lessThan": "0.8.140", "status": "affected", "version": "0.1", "versionType": "custom"}]}], "source": "ff89ba41-3aa1-4d27-914a-91399e9639e5"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "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."}, {"lang": "es", "value": "Entrada no saneada durante la generaci\u00f3n de p\u00e1ginas web en la webview de Kiro Agent en Kiro IDE antes de la versi\u00f3n 0.8.140 permite a un actor de amenaza remoto no autenticado ejecutar c\u00f3digo arbitrario a trav\u00e9s de un nombre de tema de color manipulado potencialmente da\u00f1ino cuando un usuario local abre el espacio de trabajo. Este problema requiere que el usuario conf\u00ede en el espacio de trabajo cuando se le solicite.\n\nPara remediar este problema, los usuarios deben actualizar a la versi\u00f3n 0.8.140."}], "id": "CVE-2026-5429", "lastModified": "2026-07-24T20:10:00.147", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "ff89ba41-3aa1-4d27-914a-91399e9639e5", "type": "Secondary"}], "cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "attackVector": "LOCAL", "availabilityRequirement": "NOT_DEFINED", "baseScore": 7.1, "baseSeverity": "HIGH", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "privilegesRequired": "NONE", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "ACTIVE", "valueDensity": "NOT_DEFINED", "vectorString": "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", "version": "4.0", "vulnAvailabilityImpact": "HIGH", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "ff89ba41-3aa1-4d27-914a-91399e9639e5", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-5429", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-04-02T19:17:32.056447Z", "version": "2.0.3"}}]}, "published": "2026-04-02T19:21:37.083", "references": [{"source": "ff89ba41-3aa1-4d27-914a-91399e9639e5", "url": "https://aws.amazon.com/security/security-bulletins/2026-012-aws/"}, {"source": "ff89ba41-3aa1-4d27-914a-91399e9639e5", "url": "https://kiro.dev/changelog/ide/0-8/#patch-0-8-140"}], "sourceIdentifier": "ff89ba41-3aa1-4d27-914a-91399e9639e5", "vulnStatus": "Awaiting Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-79"}], "source": "ff89ba41-3aa1-4d27-914a-91399e9639e5", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[0.1,0.8.140)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "cna", "scores": [{"score": 100.0, "source": "cna"}]}, "original": {"product": "Kiro IDE", "source": "cna", "vendor": "AWS"}, "product": "kiro_ide", "vendor": "aws"}], "analysis": {"en": {"generated_at": "2026-04-02T22:51:00.472415+00:00", "value": {"mitigation_remediation": ["Upgrade Kiro IDE to version 0.8.140 or later."], "summary": {"action": "Upgrade", "impact": "Remote Code Execution"}, "threat_synthesis": {"affected_systems": "The affected product is Kiro IDE by AWS. All installations running a version earlier than 0.8.140 are vulnerable. No other vendor or product is affected according to the available data.", "description_and_impact": "Kiro IDE versions prior to 0.8.140 contain a cross\u2011site scripting flaw in the Kiro Agent webview. Unsanitized color theme names that a workspace developer can provide are written into a dynamically generated web page. An attacker may create a malicious color theme name containing script payloads. When a local user opens a workspace that includes such a theme, the webview will execute the script in the context of the application, allowing arbitrary code to run on the user\u2019s machine. This vulnerability falls under CWE\u201179 and can potentially compromise confidentiality, integrity, and availability of the affected system.", "risk_and_exploitability": "The vulnerability carries a CVSS base score of 7.1, indicating a high severity. EPSS data is not available and the issue is not listed in CISA's KEV catalog. Because the flaw requires local user interaction (opening a workspace) but does not require prior authentication, any local user could be coerced, presenting a significant risk. An attacker would need to supply a malicious color theme and get a user to load it; once the user does so, the attacker can execute arbitrary code. The attack vector is effectively remote, luring the user into opening a malicious workspace."}}}}, "created": "2026-04-03T07:31:41.885865+00:00", "updated": "2026-04-03T09:16:38.727940+00:00", "vendors": ["aws", "aws$PRODUCT$kiro_ide"]}