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CVE-2026-118256— Vue I18n: `escapeParameter` does not escape named values when the same call also passes a list

Quick assessment

Affected
intlify vue-i18n
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Vue I18n 是 Vue.js 的国际化插件。在 9.0.0-beta.5 至 11.4.14 以及 12.0.0-alpha.5 版本中，若启用了 escapeParameter（在旧版 API 中称为 escapeParameterHtml），当同一翻译调用同时提供列表参数和命名参数时，该选项不会对命名插值值进行转义，因为 escapeParams() 函数仅处理列表分支。对于将翻译内容渲染为 HTML 并传入不可信命名参数（同时包含列表参数）的应用程序，攻击者可借此注入其控制的标记内容，包括网络钓鱼链接、

CVSS 2.1 · Low

Affected Version Matrix 2

VendorProduct Version RangeStatus
intlify vue-i18n >= 9.0.0-beta.5, < 11.4.14 affected
>= 12.0.0-alpha.1, < 12.0.0-alpha.5 affected
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I. Basic Information for CVE-2026-118256

Vulnerability Information
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Vulnerability Title
Vue I18n: `escapeParameter` does not escape named values when the same call also passes a list
Source: CVE Program / CVE List V5
Vulnerability Description
Vue I18n is the internationalization plugin for Vue.js. From 9.0.0-beta.5 until 11.4.14 and 12.0.0-alpha.5, enabling escapeParameter, called escapeParameterHtml in the Legacy API, does not escape named interpolation values when the same translation call supplies both list and named values because escapeParams() processes only the list branch. Applications that render translations as HTML and pass untrusted named values with a list can insert attacker-controlled markup, including phishing links, forms, and layout changes, and can permit script execution when combined with the srcdoc sanitizer bypass or on releases without the sanitizer. This issue is fixed in versions 11.4.14 and 12.0.0-alpha.5.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:N/VI:N/VA:N/SC:N/SI:L/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
intlify vue-i18n >= 9.0.0-beta.5, < 11.4.14 -

II. Public POCs for CVE-2026-118256

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III. Intelligence Information for CVE-2026-118256

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Other References for CVE-2026-118256 (3)

IV. Related Vulnerabilities

Same product: vue-i18n
Same vendor: intlify
Same weakness: CWE-79