Vulnerability in I18next I18next-Http-Backend
CVE-2026-115730
i18next-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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 3.1 (Low). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- github.com/i18next/i18next-http-backend/security/advisories/GHSA-9jhj-wvmw-cfx5 (vendor-advisory)
- github.com/i18next/i18next-http-backend/commit/042c3d4e4e9d73b2ae3aa76b22cb45d4… (patch)
- github.com/i18next/i18next-http-backend/security/advisories/GHSA-xvq9-wjp8-hwqf (related, vendor-advisory)
- www.vulncheck.com/advisories/i18next-http-backend-4.0.2-protocol-relative-url-i… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-115730?
- CVE-2026-115730 is a low-severity vulnerability in I18next I18next-Http-Backend, classified under Improper Neutralization of Special Elements in Output Used by a Downstream Component (Injection). CVSS score: 3.1/10. Published 2026-10-23.
- How severe is CVE-2026-115730?
- Low severity. CVSS v3 base score is 3.1 out of 10.