What is CVE-2026-42353?

CVE-2026-42353 is a high-severity vulnerability in I18next I18next-http-middleware, classified under Path Traversal. CVSS score: 8.2/10. Published 2026-05-08.

How severe is CVE-2026-42353?

High severity. CVSS v3 base score is 8.2 out of 10.

Path Traversal in I18next I18next-http-middleware

CVE-2026-42353

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…

Vulnerability class: Path Traversal (Directory Traversal)

EPSS: 0.000 (5.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N.

Affected products

I18next I18next-http-middleware — versions < 3.9.3

Weakness classification (CWE)

References

security-advisories@github.com (x_refsource_CONFIRM)

Frequently asked questions

What is CVE-2026-42353?: CVE-2026-42353 is a high-severity vulnerability in I18next I18next-http-middleware, classified under Path Traversal. CVSS score: 8.2/10. Published 2026-05-08.
How severe is CVE-2026-42353?: High severity. CVSS v3 base score is 8.2 out of 10.