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.
Metrics
Affected Vendors & Products
References
History
Fri, 09 Oct 2026 08:15:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
I18next
I18next i18next-http-backend |
|
| Vendors & Products |
I18next
I18next i18next-http-backend |
Wed, 07 Oct 2026 00:15:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| References |
| |
| Metrics |
threat_severity
|
threat_severity
|
Tue, 06 Oct 2026 19:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Metrics |
ssvc
|
Tue, 06 Oct 2026 15:00:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | 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. | |
| Title | i18next-http-backend incomplete URL validation permits SSRF | |
| Weaknesses | CWE-74 CWE-918 |
|
| References |
| |
| Metrics |
cvssV3_1
|
Status: PUBLISHED
Assigner: GitHub_M
Published: 2026-10-06T14:48:05.267Z
Updated: 2026-10-06T17:19:14.493Z
Reserved: 2026-10-05T20:37:19.364Z
Link: CVE-2026-105800
Updated: 2026-10-06T17:19:11.162Z
Status : Deferred
Published: 2026-10-06T15:17:17.173
Modified: 2026-10-06T18:16:47.547
Link: CVE-2026-105800