FKIE_CVE-2026-41886

Vulnerability from fkie_nvd - Published: 2026-05-08 16:16 - Updated: 2026-05-13 16:34
Severity ?
7.5 (High) - CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:H/A:L
Summary
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", …) handler that dispatches to registered internal handlers (editKey, commitKey, commitKeys, isLocizeEnabled, requestInitialize, …) without validating event.origin. The pre-patch listener in src/api/postMessage.js gates dispatch on event.data.sender === "i18next-editor-frame" — 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 — an iframe on a third-party page, a window.open-ed victim, a parent frame reaching down — could send a crafted postMessage and trigger the internal handlers. This issue has been patched in version 4.0.21.
References
security-advisories@github.comhttps://github.com/locize/locize/releases/tag/v4.0.21
security-advisories@github.comhttps://github.com/locize/locize/security/advisories/GHSA-w937-fg2h-xhq2
Impacted products
Vendor Product Version
To clipboard 

{
  "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"
    }
  ]
}


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