---
id: CVE-2026-105800
title: >-
  i18next-http-backend is a backend layer for i18next that loads translation
  resources in Node.js, browsers, and Deno
summary: >-
  i18next-http-backend is a backend layer for i18next that loads translation
  resources in Node.js, browsers, and Deno. Prior to 4.0.2, attacker-controlled
  language or namespace values interpolated into a custom loadPath or addPath
  that beg…
severity: low
cvss: 3.7
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N'
cwe:
  - CWE-74
  - CWE-918
vendor: i18next-http-backend
product: i18next-http-backend
affected:
  - i18next-http-backend < 4.0.2
patched:
  - i18next-http-backend 4.0.2
published: '2026-10-06'
updated: '2026-10-06'
sourceUpdated: '2026-10-06T16:08:43.180'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-105800'
references:
  - url: >-
      https://github.com/i18next/i18next-http-backend/commit/07e028862b25d0b9251bf3cafb92be2d35285f85
    label: security-advisories@github.com
  - url: 'https://github.com/i18next/i18next-http-backend/releases/tag/v4.0.2'
    label: security-advisories@github.com
  - url: >-
      https://github.com/i18next/i18next-http-backend/security/advisories/GHSA-xvq9-wjp8-hwqf
    label: security-advisories@github.com
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-105800'
  - url: 'https://github.com/advisories/GHSA-xvq9-wjp8-hwqf'
tags:
  - nvd
  - ghsa
  - npm
  - cve.org
aliases:
  - GHSA-xvq9-wjp8-hwqf
ecosystem: npm
ingestedAt: '2026-10-06T15:01:49.297Z'
---

## Overview

i18next-http-backend is a backend layer for i18next that loads translation resources in Node.js, browsers, and Deno. Prior to 4.0.2, attacker-controlled language or namespace values interpolated into a custom loadPath or addPath that begins directly with {{lng}} or {{ns}} can make colon-based input become an absolute URL or, in browsers, make a double-slash namespace become a protocol-relative URL. The resulting request can leave the intended origin and cause URL injection or server-side request forgery. The default /locales/{{lng}}/{{ns}}.json template and templates with a leading path or origin are not affected because the placeholder does not occupy the URL's structural beginning. This issue is fixed in version 4.0.2.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

## Package advisory (CVE-2026-105800)

Affected packages:

- `i18next-http-backend < 4.0.2`

Patched in:

- `i18next-http-backend 4.0.2`

Source: https://github.com/advisories/GHSA-xvq9-wjp8-hwqf