Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection') Affecting i18next-http-backend package, versions <4.0.3
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-JS-I18NEXTHTTPBACKEND-21689179
- published24 Oct 2026
- disclosed23 Oct 2026
- creditZachariah Mithani
Introduced: 23 Oct 2026
NewCVE-2026-115730 (opens in a new tab)How to fix?
Upgrade i18next-http-backend to version 4.0.3 or higher.
Overview
i18next-http-backend is an i18next-http-backend is a backend layer for i18next using in Node.js, in the browser and for Deno.
Affected versions of this package are vulnerable to Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection') via the interpolateUrl function in lib/utils.js, where a namespace value containing a leading / (permitted for nested namespaces) can combine with the template's own leading / to produce a protocol-relative URL of the form //evil.example/en.json. Browsers treat such URLs as cross-origin requests, allowing an attacker who controls the namespace parameter to redirect translation resource fetches to an arbitrary host and potentially influence application content.