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8 vulnerabilities by i18next

CVE-2026-41693 (GCVE-0-2026-41693)

Vulnerability from cvelistv5 – Published: 2026-05-08 15:38 – Updated: 2026-05-08 15:38
VLAI?
Title
i18next-fs-backend: Path traversal via unsanitised lng/ns allows arbitrary file read/overwrite
Summary
i18next-fs-backend is a backend layer for i18next using in Node.js and for Deno to load translations from the filesystem. Prior to version 2.6.4, i18next-fs-backend substitutes the lng and ns options directly into the configured loadPath / addPath templates and then read / write the resulting file from disk. The interpolation is unencoded and unvalidated, so a crafted lng or ns value — containing .., a path separator, a control character, a prototype key, or simply an unexpectedly long string — allows an attacker who can influence either value to read or overwrite files outside the intended locale directory. When lng / ns are derived from untrusted input (request-scoped i18next instances behind an HTTP layer such as i18next-http-middleware, or any framework that lets the end user pick the language via query string, cookie, or header), a single request such as ?lng=../../../../etc/passwd causes the backend to attempt to read that path. This issue has been patched in version 2.6.4.
Severity ?
8.2 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N
CWE
  • CWE-73 - External Control of File Name or Path
  • CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Assigner
References
Impacted products
Vendor Product Version
i18next i18next-fs-backend Affected: < 2.6.4
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CVE-2026-42353 (GCVE-0-2026-42353)

Vulnerability from cvelistv5 – Published: 2026-05-08 15:29 – Updated: 2026-05-08 23:30
VLAI?
Title
Path traversal / SSRF in i18next-http-middleware via user-controlled language and namespace parameters
Summary
i18next-http-middleware is a middleware to be used with Node.js web frameworks like express or Fastify and also for Deno. Prior to version 3.9.3, i18next-http-middleware passes the user-controlled lng and ns values from getResourcesHandler directly into i18next.services.backendConnector.load(languages, namespaces, …) without any sanitization. Depending on which backend is configured, the unvalidated path segments enable either path traversal or SSRF. This issue has been patched in version 3.9.3.
Severity ?
8.2 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N
CWE
  • CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
  • CWE-918 - Server-Side Request Forgery (SSRF)
Assigner
References
Impacted products
Vendor Product Version
i18next i18next-http-middleware Affected: < 3.9.3
Create a notification for this product.
Show details on NVD website
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CVE-2026-41683 (GCVE-0-2026-41683)

Vulnerability from cvelistv5 – Published: 2026-05-08 15:27 – Updated: 2026-05-08 23:29
VLAI?
Title
HTTP response splitting and DoS in i18next-http-middleware via unsanitised Content-Language header
Summary
i18next-http-middleware is a middleware to be used with Node.js web frameworks like express or Fastify and also for Deno. Prior to version 3.9.3, i18next-http-middleware wrote user-controlled language values into the Content-Language response header after passing them through utils.escape(), which is an HTML-entity encoder that does not strip carriage return, line feed, or other control characters. When the application used an older i18next (< 19.5.0) that still exercised the backward-compatibility fallback at LanguageDetector.js:100 or otherwise produced a raw detected value, CRLF sequences in the attacker-controlled lng parameter reached res.setHeader('Content-Language', ...) verbatim. This issue has been patched in version 3.9.3.
Severity ?
8.6 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:L
CWE
  • CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
  • CWE-113 - Improper Neutralization of CRLF Sequences in HTTP Headers ('HTTP Request/Response Splitting')
Assigner
References
Impacted products
Vendor Product Version
i18next i18next-http-middleware Affected: < 3.9.3
Create a notification for this product.
Show details on NVD website
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CVE-2026-41690 (GCVE-0-2026-41690)

Vulnerability from cvelistv5 – Published: 2026-05-08 15:24 – Updated: 2026-05-08 16:43
VLAI?
Title
Prototype pollution and path traversal in i18next-http-middleware via user-controlled language and namespace parameters
Summary
18next-http-middleware is a middleware to be used with Node.js web frameworks like express or Fastify and also for Deno. Versions prior to 3.9.3 allow an unauthenticated HTTP client to pollute Object.prototype in the Node.js process hosting the middleware, via two unvalidated entry points that reach internal object-key writes: getResourcesHandler and missingKeyHandler. This can break authorisation checks (if (user.isAdmin) returning true for any user), cause type-confusion DoS, and depending on downstream code it can be chained into RCE.
Severity ?
8.6 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:L
CWE
  • CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
  • CWE-1321 - Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')
Assigner
References
Impacted products
Vendor Product Version
i18next i18next-http-middleware Affected: < 3.9.3
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2026-41691 (GCVE-0-2026-41691)

Vulnerability from cvelistv5 – Published: 2026-05-07 20:09 – Updated: 2026-05-08 13:08
VLAI?
Title
i18next-http-backend has Path Traversal & URL Injection via Unsanitised lng/ns
Summary
Copilot said: i18nextify is a JavaScript library that adds i18nextify is a JavaScript library that adds website internationalization via a script tag, without source code changes. Versions prior to 3.0.5 interpolate the lng and ns values directly into the configured loadPath / addPath URL template without any encoding, validation, or path sanitisation. When an application exposes the language-code selection to user-controlled input (the default — i18next-browser-languagedetector reads ?lng= query params, cookies, localStorage, and request headers), an attacker can inject characters that change the structure of the outgoing request URL. This is a single URL-injection vulnerability. The attacker-controlled value is neutralised before it is used as part of an output URL string; the attack shape covers both path traversal and broader URL-structure injection — both are closed by the one interpolateUrl sanitisation fix. This issue has been fixed in version 3.0.5. If users cannot upgrade immediately, they can work around the issue by sanitising lng / ns before they reach i18next (strip .., /, \, ?, #, %, whitespace, and control characters; cap the length).
Severity ?
6.5 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
CWE
  • CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
  • CWE-74 - Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')
Assigner
References
Impacted products
Vendor Product Version
i18next i18next-http-backend Affected: < 3.0.5
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2026-41692 (GCVE-0-2026-41692)

Vulnerability from cvelistv5 – Published: 2026-05-07 20:01 – Updated: 2026-05-07 20:01
VLAI?
Title
i18nextify is vulnerable to DOM XSS via javascript:/data: URL schemes in translated href/src attributes
Summary
i18nextify is a JavaScript library that adds website internationalization via a script tag, without source code changes. Versions prior to 4.0.8 substitute {{key}} interpolation tokens inside src and href attribute values with the raw string returned by i18next.t(). The substitution logic in src/localize.js (the replaceInside handler) only guards against a duplicated http:// origin prefix — it does not validate the URL scheme of the substituted value. A translated value such as javascript:alert(1) or data:text/html,<script>...</script> is applied unchanged to the live DOM attribute when an attacker can influence the content of a translation file or the translation-backend response — for example, via a compromised translation CDN, user-contributed locales, a MITM on a plain-HTTP backend, or write access to the translation JSON. This issue was patched in version 4.0.8.
Severity ?
4.7 (Medium)
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N
CWE
  • CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
  • CWE-94 - Improper Control of Generation of Code ('Code Injection')
Assigner
References
Impacted products
Vendor Product Version
i18next i18nextify Affected: < 4.0.8
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2017-16008 (GCVE-0-2017-16008)

Vulnerability from cvelistv5 – Published: 2018-06-04 19:00 – Updated: 2024-09-16 17:53
VLAI?
Summary
i18next is a language translation framework. Because of how the interpolation is implemented, making replacements from the dictionary one at a time, untrusted user input can use the name of one of the dictionary keys to inject script into the browser. This affects i18next <=1.10.2.
Severity ?
No CVSS data available.
CWE
  • CWE-79 - Cross-site Scripting (XSS) - Generic (CWE-79)
Assigner
References
Impacted products
Vendor Product Version
HackerOne i18next node module Affected: <=1.10.2
Create a notification for this product.
Date Public ?
2018-04-26 00:00
Show details on NVD website
To clipboard 

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CVE-2017-16010 (GCVE-0-2017-16010)

Vulnerability from cvelistv5 – Published: 2018-05-29 20:00 – Updated: 2024-09-16 18:38
VLAI?
Summary
i18next is a language translation framework. When using the .init method, passing interpolation options without passing an escapeValue will default to undefined rather than the assumed true. This can result in a cross-site scripting vulnerability because user input is assumed to be escaped, but is not. This vulnerability affects i18next 2.0.0 and later.
Severity ?
No CVSS data available.
CWE
  • CWE-79 - Cross-site Scripting (XSS) - Generic (CWE-79)
Assigner
References
Impacted products
Vendor Product Version
HackerOne i18next node module Affected: >=2.0.0 <=3.4.3
Create a notification for this product.
Date Public ?
2018-04-26 00:00
Show details on NVD website
To clipboard 

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