CVE-2026-118257highCWE-116CWE-79

CVE-2026-118257: high-severity vulnerability in intlify vue-i18n

Vue I18n: escapeParameter does not prevent XSS through srcdoc in translation messages

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21Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 7.2epss 0.3%
Vue I18n is the internationalization plugin for Vue.js. From 11.1.10 until 11.4.14 and from 12.0.0-alpha.4 until 12.0.0-alpha.5, sanitizeTranslatedHtml() escapes markup and event-handler text inside an iframe srcdoc value but leaves the srcdoc attribute active. Browsers decode the character references and parse the value as a same-origin nested HTML document, allowing attacker-controlled parameters or translation content placed in srcdoc to execute script when applications enable escapeParameter and render translations as HTML through v-html. Versions 9.14.5 and 10.0.8 are also affected and are no longer supported, while i18n-t rendering is not affected. This issue is fixed in versions 11.4.14 and 12.0.0-alpha.5.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
Affected products
intlify · vue-i18n
Related CVEs — intlify vue-i18n

In the same product, most dangerous first.

CVE-2025-53892MEDIUMIntlify Vue I18n's escapeParameterHtml does not prevent DOM-based XSS via tag attributes like onerrorEPSS 0.8%CVE-2024-52810MEDIUMPrototype Pollution in @intlify/shared >=9.7.0 <= 10.0.4EPSS 0.8%CVE-2024-52809MEDIUMCross-site Scripting vulnerability with prototype pollution in vue-i18nEPSS 0.7%CVE-2025-27597HIGHVue I18n Prototype Pollution in `handleFlatJson`EPSS 0.6%CVE-2026-118256LOWVue I18n: `escapeParameter` does not escape named values when the same call also passes a listEPSS 0.5%