CVE-2026-115730

EUVD-2026-108941
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.
Injection
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
3.1 LOW
NETWORK
HIGH
NONE
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N
Awaiting analysis
This vulnerability is currently awaiting analysis.
Base Score
CVSS 3.x
EPSS Score
Percentile: Unknown
Common Weakness Enumeration
References
https://github.com/i18next/i18next-http-backend/commit/042c3d4e4e9d73b2ae3aa76b22cb45d48f1e35b7
https://github.com/i18next/i18next-http-backend/security/advisories/GHSA-9jhj-wvmw-cfx5
https://github.com/i18next/i18next-http-backend/security/advisories/GHSA-xvq9-wjp8-hwqf
https://www.vulncheck.com/advisories/i18next-http-backend-4.0.2-protocol-relative-url-injection-via-namespace-in-interpolateurl