Low · CVSS 2.3CVE-2026-115730

i18next-http-backend 4.0.2 Protocol-Relative URL Injection via Namespace in interpolateUrlCVE-2026-115730

Answer in brief

CVE-2026-115730 records a Low severity (CVSS 2.3) vulnerability in i18next-http-backend 4.0.2 Protocol-Relative URL Injection via Namespace in interpolateUrl. The current sources do not mark it as known exploited. The current feed maps i18next/i18next-http-backend (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Oct 23, 2026Updated Oct 23, 2026Source checked Oct 23, 2026First seen by HOL Oct 23, 2026Material review Oct 23, 2026

Upstream Advisory

Key facts

Risk: Low · CVSS 2.3
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Available

Why this deserves its current priority

CVSS is 2.3. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps i18next/i18next-http-backend (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
i18next/i18next-http-backendgeneric	>=4.0.2 <4.0.3	4.0.3

Recommended response

Check inventory. Check lockfiles and deployed manifests for i18next/i18next-http-backend.
Review the reported fix. Update i18next/i18next-http-backend to 4.0.3 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Oct 23, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Oct 23, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Oct 23, 2026

Sources and claim methodology

Upstream source description

i18next-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.

Quoted source text, attributed separately from HOL analysis.