i18next-http-backend: Query-parameter injection through & and = in lng when loadPath/addPath puts {{lng}} in the query string

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

• CISA KEV Not listed.
• EPSS 0.0028, the 20th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

1. 28 Oct 2026, 18:33 UTC Confirmed by the CVE List
2. 28 Oct 2026, 19:17 UTC Confirmed by NVD
3. 31 Oct 2026, 13:32 UTC First seen by agentprime
4. 31 Oct 2026, 13:32 UTC Confirmed by OSV

Sources

• GitHub Advisory Database: GHSA-3cmx-xjww-583x
• OSV: GHSA-3cmx-xjww-583x
• github.com/i18next/i18next-http-backend/security/advisories/GHSA-3cmx-xjww-583x
• github.com/i18next/i18next-http-backend/commit/b0eef9efd425055c554787cef7f878de33bbf510
• github.com/i18next/i18next-http-backend
• github.com/i18next/i18next-http-backend/releases/tag/v4.0.4

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.