---
id: "GHSA-w47m-j727-m843"
kind: "vulnerability"
aliases: ["GHSA-w47m-j727-m843"]
title: "Duplicate Advisory: Namespace value starting with / forms a protocol-relative URL when loadPath/addPath places {{ns}} right after a / (bypass of the // check added for GHSA-xvq9-wjp8-hwqf)"
severity: "low"
cvss: 3.1
epss: null
exploited: false
status: "withdrawn"
category: "package"
products: [{"name": "i18next-http-backend", "fixed": [], "affected": "<= 4.0.2", "ecosystem": "npm"}]
ecosystems: ["npm"]
tags: ["cwe-74", "frontend", "i18next-http-backend", "javascript", "npm", "package"]
not_affected_if: ["fixed-load-path", "static-namespaces"]
published_at: "2026-10-23T15:31:30+00:00"
first_seen_at: "2026-10-28T21:12:46+00:00"
updated_at: "2026-10-28T21:13:41+00:00"
sources: [{"source": "ghsa", "url": "https://github.com/advisories/GHSA-w47m-j727-m843", "first_seen_at": "2026-10-28T21:12:46+00:00"}]
---

# Duplicate Advisory: Namespace value starting with / forms a protocol-relative URL when loadPath/addPath places {{ns}} right after a / (bypass of the // check added for GHSA-xvq9-wjp8-hwqf)

A namespace value starting with a slash can form a protocol-relative URL in loadPath or addPath templates, so translation requests go to an attacker-chosen host. An attacker who controls the namespace can then serve translations that inject UI content and cross-site scripting.

_Summary, check and fix written by a model from the sources; labelled as such._

## Affected

- npm:i18next-http-backend affected <= 4.0.2 fixed ?

## How to check

- `npm ls i18next-http-backend` to find the installed version
- Check whether loadPath or addPath in the i18next backend config places {{ns}} directly after a /

## Fix

- Upgrade i18next-http-backend past `4.0.2` to the release that GHSA-9jhj-wvmw-cfx5 covers, as the advisory is a duplicate of it
- unknown: the sources do not name the exact fixed version

## Timeline

- 2026-10-28T21:12:46+00:00 ghsa https://github.com/advisories/GHSA-w47m-j727-m843

## From the sources

## Duplicate Advisory

This advisory has been withdrawn because it is a duplicate of GHSA-9jhj-wvmw-cfx5. This link is maintained to preserve external references.

## Original Descriptioni18next-http-backend 4.0.2 contains an incomplete fix in interpolateUrl() that allows attackers to redirect translation requests by supplying an ns value starting with a slash. Attackers controlling the namespace value can form a protocol-relative URL in loadPath or addPath templates to load attacker-hosted translations, enabling UI content injection and cross-site scripting.

---

_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_