CVE-2026-105800

i18next-http-backend is a backend layer for i18next that loads translation resources in Node.js, browsers, and Deno. Prior to 4.0.2, attacker-controlled language or namespace values interpolated into a custom loadPath or addPath that begins directly with {{lng}} or {{ns}} can make colon-based input become an absolute URL or, in browsers, make a double-slash namespace become a protocol-relative URL. The resulting request can leave the intended origin and cause URL injection or server-side request forgery. The default /locales/{{lng}}/{{ns}}.json template and templates with a leading path or origin are not affected because the placeholder does not occupy the URL's structural beginning. This issue is fixed in version 4.0.2.

CVSS v3 3.7 LOW

3.7^/10

CVSS v3 : LOW

Vector :

Exploitability : 2.2 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction NONE

Confidentiality Impact LOW

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/i18next/i18next-http-backend/commit/07e028862b25d0b9251bf3cafb92be2d35285f85
https://github.com/i18next/i18next-http-backend/releases/tag/v4.0.2
https://github.com/i18next/i18next-http-backend/security/advisories/GHSA-xvq9-wjp8-hwqf
https://github.com/i18next/i18next-http-backend/security/advisories/GHSA-xvq9-wjp8-hwqf

Configurations

No configuration.

History

06 Oct 2026, 18:16

Type	Values Removed	Values Added
References	~~() https://github.com/i18next/i18next-http-backend/security/advisories/GHSA-xvq9-wjp8-hwqf -~~	() https://github.com/i18next/i18next-http-backend/security/advisories/GHSA-xvq9-wjp8-hwqf -

06 Oct 2026, 15:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-10-06 15:17

Updated : 2026-10-06 18:16

NVD link : CVE-2026-105800

Mitre link : CVE-2026-105800

CVE.ORG link : CVE-2026-105800

JSON object : View

Products Affected

No product.

CWE

CWE-74

Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')

CWE-918

Server-Side Request Forgery (SSRF)

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