PT-2026-37152 · Npm · I18Nextify

Published 2026-04-22 · Updated 2026-05-08 · CVE-2026-41692

Positive Technologies (AI Summary)

CVSS v3.1

4.7

Medium

Base vector

AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N

Name of the Vulnerable Software and Affected Versions i18nextify versions prior to 4.0.8

Description The software substitutes {{key}} interpolation tokens within src and href attribute values using the raw string from i18next.t(). The substitution logic in the replaceInside handler within src/localize.js fails to validate the URL scheme of the substituted value, only checking for duplicated http:// origin prefixes. This allows an attacker who can influence translation files or backend responses—such as through a compromised CDN, user-contributed locales, or MITM attacks on plain-HTTP backends—to inject malicious URIs like javascript:, data:, vbscript:, or file:. This can lead to arbitrary JavaScript execution when a user clicks a link or when a script payload runs in the page's origin via <iframe>, <object>, or <embed> tags.

Recommendations Update to version 4.0.8. As a temporary mitigation, audit all translation files for javascript:, data:, vbscript:, and file: prefixes in values used in href or src attributes and restrict write access to these files to trusted operators.

Fix

XSS

Code Injection

Weakness Enumeration

CWE-79

CWE-94

Related Identifiers

CVE-2026-41692

GHSA-6457-MXPQ-4FQQ

Affected Products

I18Nextify

References · 6

• https://osv.dev/vulnerability/GHSA-6457-mxpq-4fqq · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-41692 · Security Note
• https://github.com/i18next/i18nextify/security/advisories/GHSA-6457-mxpq-4fqq · Note
• https://github.com/i18next/i18nextify · Note
• https://github.com/i18next/i18nextify/commit/16f23dbcdcf893673587f7a03355bf7ce0a0e49e · Note
• https://twitter.com/VulmonFeeds/status/2052655669455507509 · Twitter Post