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[ CVE-2026-118257 · Published 28 Oct 2026 ]

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

CVSS 7.2 EPSS <1%Fix available

[ Description ]Official description

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.

[ Fixes ]Fixes and patches

  • vue-i18n 11.4.14Fixed version · GitHub Advisories · npm package vue-i18n: upgrade to 11.4.14 or later (affected >= 11.1.10, < 11.4.14)
  • vue-i18n 12.0.0-alpha.5Fixed version · GitHub Advisories · npm package vue-i18n: upgrade to 12.0.0-alpha.5 or later (affected = 12.0.0-alpha.4)
  • petite-vue-i18n 11.4.14Fixed version · GitHub Advisories · npm package petite-vue-i18n: upgrade to 11.4.14 or later (affected >= 11.1.10, < 11.4.14)
  • petite-vue-i18n 12.0.0-alpha.5Fixed version · GitHub Advisories · npm package petite-vue-i18n: upgrade to 12.0.0-alpha.5 or later (affected = 12.0.0-alpha.4)
  • @intlify/core-base 11.4.14Fixed version · GitHub Advisories · npm package @intlify/core-base: upgrade to 11.4.14 or later (affected >= 11.1.10, < 11.4.14)
  • @intlify/core-base 12.0.0-alpha.5Fixed version · GitHub Advisories · npm package @intlify/core-base: upgrade to 12.0.0-alpha.5 or later (affected = 12.0.0-alpha.4)
  • @intlify/core 11.4.14Fixed version · GitHub Advisories · npm package @intlify/core: upgrade to 11.4.14 or later (affected >= 11.1.10, < 11.4.14)
  • @intlify/core 12.0.0-alpha.5Fixed version · GitHub Advisories · npm package @intlify/core: upgrade to 12.0.0-alpha.5 or later (affected = 12.0.0-alpha.4)
  • @intlify/vue-i18n-core 11.4.14Fixed version · GitHub Advisories · npm package @intlify/vue-i18n-core: upgrade to 11.4.14 or later (affected >= 11.1.10, < 11.4.14)
  • @intlify/vue-i18n-core 12.0.0-alpha.5Fixed version · GitHub Advisories · npm package @intlify/vue-i18n-core: upgrade to 12.0.0-alpha.5 or later (affected = 12.0.0-alpha.4)
  • @intlify/shared 11.4.14Fixed version · GitHub Advisories · npm package @intlify/shared: upgrade to 11.4.14 or later (affected >= 11.1.10, < 11.4.14)
  • @intlify/shared 12.0.0-alpha.5Fixed version · GitHub Advisories · npm package @intlify/shared: upgrade to 12.0.0-alpha.5 or later (affected = 12.0.0-alpha.4)

[ Packages ]Affected open-source packages

[ References ]References