Vulnerability Description
i18next-http-backend is a backend layer for i18next that loads translation resources in Node.js, browsers, and Deno. Prior to 4.0.4, interpolateUrl inserts unencoded language and namespace values into loadPath or addPath templates without rejecting ampersand (&), equals (=), or semicolon (;) query separators. When a template places lng or ns in the query string and an attacker controls that value, the attacker can add or override parameters on browser or server-side translation requests, potentially exposing other namespaces or tenants or changing backend behavior through the application's network position and credentials. This vulnerability is the result of an incomplete fix for CVE-2026-41691. This issue is fixed in version 4.0.4.
CVSS Score
LOW
Related Weaknesses (CWE)
References
- https://github.com/i18next/i18next-http-backend/commit/b0eef9efd425055c554787cef
- https://github.com/i18next/i18next-http-backend/releases/tag/v4.0.4
- https://github.com/i18next/i18next-http-backend/security/advisories/GHSA-3cmx-xj
FAQ
What is CVE-2026-118258?
CVE-2026-118258 is a vulnerability with a CVSS score of 3.7 (LOW). i18next-http-backend is a backend layer for i18next that loads translation resources in Node.js, browsers, and Deno. Prior to 4.0.4, interpolateUrl inserts unencoded language and namespace values into...
How severe is CVE-2026-118258?
CVE-2026-118258 has been rated LOW with a CVSS base score of 3.7/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-118258?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.