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VulnerabilityPublished Updated

CVE-2026-41692: i18next i18nextify · Cross-site Scripting

Affects i18next i18nextifySource CVE Database V5

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Not known to be exploited · CVSS 4.7 Medium : upgrade to 4.0.8 when convenient.

Data as of 30 Oct 2026, 06:59 UTC

CVSS 3.1 base score
4.7Medium
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.1% chance of exploitation in 30 days – higher than 3% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 4.0.8
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 7 May 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 29 Oct 2026.

What to do

Upgrade i18next i18nextify to 4.0.8.

Affected software

ProductAffectedFixed in
i18nexti18nextifyAffected
  • <4.0.8
Fixed in
  • 4.0.8
npmi18nextifypkg:npm/i18nextifyOther threatsAffected
  • <4.0.8
Fixed in
  • 4.0.8

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

A fix is available in i18nextify version 4.0.8. Users should upgrade to version 4.0.8 or later to remediate this vulnerability. Until upgraded, avoid using untrusted or user-contributed translation content and ensure translation backends are secured against tampering. Patch status is confirmed by the vendor advisory indicating the issue was fixed in version 4.0.8.

Description

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.

References

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