Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2026-41691— i18next-http-backend has Path Traversal & URL Injection via Unsanitised lng/ns

Quick assessment

Affected
i18next i18next-http-backend
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.

i18next-http-backend是i18next开源的一个跨平台的后端资源加载工具。 i18next-http-backend 3.0.5之前版本存在路径遍历漏洞，该漏洞源于将lng和ns值直接插入URL模板而未进行编码、验证或路径清理，可能导致URL注入。

CVSS 6.5 · Medium EPSS 0.39% · P30

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProduct Version RangeStatus
i18next i18next-http-backend < 3.0.5 affected
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-41691

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
i18next-http-backend has Path Traversal & URL Injection via Unsanitised lng/ns
Source: CVE Program / CVE List V5
Vulnerability Description
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).
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
对路径名的限制不恰当(路径遍历)
Source: CVE Program / CVE List V5
Vulnerability Title
i18next-http-backend 路径遍历漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
i18next-http-backend是i18next开源的一个跨平台的后端资源加载工具。 i18next-http-backend 3.0.5之前版本存在路径遍历漏洞，该漏洞源于将lng和ns值直接插入URL模板而未进行编码、验证或路径清理，可能导致URL注入。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
i18next i18next-http-backend < 3.0.5 -

II. Public POCs for CVE-2026-41691

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-41691

请登录查看更多情报信息。

Vendor Advisories for CVE-2026-41691 (1)

IV. Related Vulnerabilities

Same product: i18next-http-backend
Same vendor: i18next
Same weakness: CWE-22

V. Comments for CVE-2026-41691

No comments yet

Leave a comment