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CVE-2026-115730— i18next-http-backend 4.0.2 Protocol-Relative URL Injection via Namespace in interpolateUrl

Quick assessment

Affected
i18next i18next-http-backend
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

i18next-http-backend 4.0.2 版本中， 函数的修复不完整，攻击者可通过提供以斜杠（/）开头的 （命名空间）值，重定向翻译请求。若攻击者能够控制命名空间值，便可在 或 模板中构造协议相对 URL，从而加载由攻击者托管的翻译资源，进而实现 UI 内容注入和跨站脚本攻击（XSS）。

CVSS 3.1 · Low

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-115730

Vulnerability Information
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Vulnerability Title
i18next-http-backend 4.0.2 Protocol-Relative URL Injection via Namespace in interpolateUrl
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
输出中的特殊元素转义处理不恰当(注入)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
i18next i18next-http-backend 4.0.2 ~ 4.0.3 -

II. Public POCs for CVE-2026-115730

# POC Description Source Link Shenlong Link
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III. Intelligence Information for CVE-2026-115730

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Vendor Advisories for CVE-2026-115730 (1)

Other References for CVE-2026-115730 (3)

IV. Related Vulnerabilities

Same product: i18next-http-backend
Same vendor: i18next
Same weakness: CWE-74

V. Comments for CVE-2026-115730

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