i18next-http-backend: Namespace value starting with / forms a protocol-relative URL when loadPath/addPath places {{ns}} right after a / (bypass of the // check added for GHSA-xvq9-wjp8-hwqf)

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 0.0032, the 24th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

1. 31 Oct 2026, 13:33 UTC First seen by agentprime
2. 31 Oct 2026, 13:33 UTC Confirmed by OSV

Sources

• GitHub Advisory Database: GHSA-9jhj-wvmw-cfx5
• OSV: GHSA-9jhj-wvmw-cfx5
• github.com/i18next/i18next-http-backend/security/advisories/GHSA-9jhj-wvmw-cfx5
• nvd.nist.gov/vuln/detail/CVE-2026-115730
• github.com/i18next/i18next-http-backend/commit/042c3d4e4e9d73b2ae3aa76b22cb45d48f1e35b7
• github.com/i18next/i18next-http-backend
• www.vulncheck.com/advisories/i18next-http-backend-4.0.2-protocol-relative-url-injection-via-namespace-in-interpolateurl

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.