Duplicate Advisory: 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)

Severity: low · CVSS 3.1 · Published 2026-10-23

## Duplicate Advisory

This advisory has been withdrawn because it is a duplicate of GHSA-9jhj-wvmw-cfx5. This link is maintained to preserve external references.

## Original Descriptioni18next-http-backend 4.0.2 contains an incomplete fix in interpolateUrl() that allows attackers to redirect translation requests by supplying an ns value starting with a slash. Attackers controlling the namespace value can form a protocol-relative URL in loadPath or addPath templates to load attacker-hosted translations, enabling UI content injection and cross-site scripting.

Technologies: i18next-http-backend (npm). Vendors: npm.

Quick answers

Is This vulnerability exploited in the wild?
No. Junglewise Threat Intelligence has no report of This vulnerability being exploited in the wild.
How severe is This vulnerability?
Low severity, with a CVSS score of 3.1, published 23 October 2026.
Which products and versions are affected?
i18next-http-backend (npm) <= 4.0.2, SEMVER:introduced=0,last_affected=4.0.2.
Is there a fix for This vulnerability?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
Am I affected?
Check whether you run i18next-http-backend (npm) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Affected products

  • i18next-http-backend (npm) <= 4.0.2, SEMVER:introduced=0,last_affected=4.0.2

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