CVE-2026-41885— Path traversal / URL injection via unsanitised lng/ns/projectId/version in i18next-locize-backend

Path traversal / URL injection via unsanitised lng/ns/projectId/version in i18next-locize-backend

i18next-locize-backend is a simple i18next backend for locize.com which can be used in Node.js, in the browser and for Deno. Prior to version 9.0.2, i18next-locize-backend interpolates lng, ns, projectId, and version directly into the configured loadPath / privatePath / addPath / updatePath / getLanguagesPath URL templates with no path-component validation and no encoding. When an application exposes any of these values to user-controlled input (?lng= / ?ns= query parameters via i18next-browser-languagedetector, cookies, request headers, or a URL-derived projectId), a crafted value can change the structure of the outgoing request URL. Affected call sites in lib/index.js (pre-patch): the interpolate() helper is used at the five URL-build sites — _readAny/read (line 415 for private, 426 for public), getLanguages (lines 271 and 296), and writePage (lines 616 and 622) for the missing-key and update POST paths. The helper interpolate in lib/utils.js substitutes raw values with no encoding. This issue has been patched in version 9.0.2.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

对路径名的限制不恰当(路径遍历)

i18next-locize-backend 路径遍历漏洞

i18next-locize-backend是locize开源的一款国际化资源加载与缺失键保存插件。 i18next-locize-backend 9.0.2之前版本存在路径遍历漏洞，该漏洞源于将lng、ns、projectId和version直接插入URL模板时未进行路径组件验证和编码，可能导致请求URL结构改变。

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