Directory Traversal Affecting node-i18next-http-backend package, versions *


Severity

Recommended
0.0
critical
0
10

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Threat Intelligence

EPSS
0.31% (23rd percentile)

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  • Snyk IDSNYK-ECHOLATEST-NODEI18NEXTHTTPBACKEND-20840227
  • published12 Oct 2026
  • disclosed7 May 2026

Introduced: 7 May 2026

CVE-2026-41691  (opens in a new tab)
CWE-22  (opens in a new tab)
CWE-74  (opens in a new tab)

How to fix?

There is no fixed version for Echo:latest node-i18next-http-backend.

NVD Description

Note: Versions mentioned in the description apply only to the upstream node-i18next-http-backend package and not the node-i18next-http-backend package as distributed by Echo. See How to fix? for Echo:latest relevant fixed versions and status.

Copilot said: i18nextify is a JavaScript library that adds i18nextify is a JavaScript library that adds website internationalization via a script tag, without source code changes. Versions prior to 3.0.5 interpolate the lng and ns values directly into the configured loadPath / addPath URL template without any encoding, validation, or path sanitisation. When an application exposes the language-code selection to user-controlled input (the default — i18next-browser-languagedetector reads ?lng= query params, cookies, localStorage, and request headers), an attacker can inject characters that change the structure of the outgoing request URL. This is a single URL-injection vulnerability. The attacker-controlled value is neutralised before it is used as part of an output URL string; the attack shape covers both path traversal and broader URL-structure injection — both are closed by the one interpolateUrl sanitisation fix. This issue has been fixed in version 3.0.5. If users cannot upgrade immediately, they can work around the issue by sanitising lng / ns before they reach i18next (strip .., /, , ?, #, %, whitespace, and control characters; cap the length).

CVSS Base Scores

version 3.1