{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-41886", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-04-22T15:11:54.671Z", "datePublished": "2026-05-08T15:45:23.262Z", "dateUpdated": "2026-05-08T21:26:51.755Z"}, "containers": {"cna": {"title": "locize Client SDK: Cross-origin DOM XSS & Handler Hijack Through Missing e.origin Validation in InContext Editor", "problemTypes": [{"descriptions": [{"cweId": "CWE-79", "lang": "en", "description": "CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')", "type": "CWE"}]}, {"descriptions": [{"cweId": "CWE-346", "lang": "en", "description": "CWE-346: Origin Validation Error", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "LOW", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "LOW", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "CHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:H/A:L", "version": "3.1"}}], "references": [{"name": "https://github.com/locize/locize/security/advisories/GHSA-w937-fg2h-xhq2", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/locize/locize/security/advisories/GHSA-w937-fg2h-xhq2"}, {"name": "https://github.com/locize/locize/releases/tag/v4.0.21", "tags": ["x_refsource_MISC"], "url": "https://github.com/locize/locize/releases/tag/v4.0.21"}], "affected": [{"vendor": "locize", "product": "locize", "versions": [{"version": "< 4.0.21", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-05-08T15:45:23.262Z"}, "descriptions": [{"lang": "en", "value": "locize is a localization platform that connects code and i18n setup. Prior to version 4.0.21, the locize client SDK registers a window.addEventListener(\"message\", \u2026) handler that dispatches to registered internal handlers (editKey, commitKey, commitKeys, isLocizeEnabled, requestInitialize, \u2026) without validating event.origin. The pre-patch listener in src/api/postMessage.js gates dispatch on event.data.sender === \"i18next-editor-frame\" \u2014 that value sits inside the attacker-controlled message payload, not the browser-enforced origin. Any web page that could embed or be embedded by a locize-enabled host \u2014 an iframe on a third-party page, a window.open-ed victim, a parent frame reaching down \u2014 could send a crafted postMessage and trigger the internal handlers. This issue has been patched in version 4.0.21."}], "source": {"advisory": "GHSA-w937-fg2h-xhq2", "discovery": "UNKNOWN"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-05-08T17:09:37.364700Z", "id": "CVE-2026-41886", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-05-08T21:26:51.755Z"}}]}}

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{"cveTags": [], "descriptions": [{"lang": "en", "value": "locize is a localization platform that connects code and i18n setup. Prior to version 4.0.21, the locize client SDK registers a window.addEventListener(\"message\", \u2026) handler that dispatches to registered internal handlers (editKey, commitKey, commitKeys, isLocizeEnabled, requestInitialize, \u2026) without validating event.origin. The pre-patch listener in src/api/postMessage.js gates dispatch on event.data.sender === \"i18next-editor-frame\" \u2014 that value sits inside the attacker-controlled message payload, not the browser-enforced origin. Any web page that could embed or be embedded by a locize-enabled host \u2014 an iframe on a third-party page, a window.open-ed victim, a parent frame reaching down \u2014 could send a crafted postMessage and trigger the internal handlers. This issue has been patched in version 4.0.21."}], "id": "CVE-2026-41886", "lastModified": "2026-05-13T16:34:42.677", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "LOW", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "LOW", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "CHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:H/A:L", "version": "3.1"}, "exploitabilityScore": 1.6, "impactScore": 5.3, "source": "security-advisories@github.com", "type": "Secondary"}]}, "published": "2026-05-08T16:16:12.060", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/locize/locize/releases/tag/v4.0.21"}, {"source": "security-advisories@github.com", "url": "https://github.com/locize/locize/security/advisories/GHSA-w937-fg2h-xhq2"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-79"}, {"lang": "en", "value": "CWE-346"}], "source": "security-advisories@github.com", "type": "Primary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,4.0.21)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "cna", "scores": [{"score": 100.0, "source": "cna"}]}, "original": {"product": "locize", "source": "cna", "vendor": "locize"}, "product": "locize", "vendor": "locize"}], "created": "2026-05-08T17:45:13.101868+00:00", "updated": "2026-05-10T21:25:05.952635+00:00", "vendors": ["locize", "locize$PRODUCT$locize"]}