CVE-2026-118258

Full vulnerability record from the local CVENow database.

Description

i18next-http-backend is a backend layer for i18next that loads translation resources in Node.js, browsers, and Deno. Prior to 4.0.4, interpolateUrl inserts unencoded language and namespace values into loadPath or addPath templates without rejecting ampersand (&), equals (=), or semicolon (;) query separators. When a template places lng or ns in the query string and an attacker controls that value, the attacker can add or override parameters on browser or server-side translation requests, potentially exposing other namespaces or tenants or changing backend behavior through the application's network position and credentials. This vulnerability is the result of an incomplete fix for CVE-2026-41691. This issue is fixed in version 4.0.4.

Severity

LOW

CVSS score

3.7 (v3.1)

Vulnerability status

Deferred

Source identifier

[email protected]

Published

2026-10-28 19:17:30.360000

Last modified

2026-10-29 15:53:48.130000

View original CVE JSON

{
  "id": "CVE-2026-118258",
  "sourceIdentifier": "[email protected]",
  "published": "2026-10-28T19:17:30.360",
  "lastModified": "2026-10-29T15:53:48.130",
  "vulnStatus": "Deferred",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "i18next-http-backend is a backend layer for i18next that loads translation resources in Node.js, browsers, and Deno. Prior to 4.0.4, interpolateUrl inserts unencoded language and namespace values into loadPath or addPath templates without rejecting ampersand (&), equals (=), or semicolon (;) query separators. When a template places lng or ns in the query string and an attacker controls that value, the attacker can add or override parameters on browser or server-side translation requests, potentially exposing other namespaces or tenants or changing backend behavior through the application's network position and credentials. This vulnerability is the result of an incomplete fix for CVE-2026-41691. This issue is fixed in version 4.0.4."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "i18next",
          "product": "i18next-http-backend",
          "versions": [
            {
              "version": "< 4.0.4",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N",
          "baseScore": 3.7,
          "baseSeverity": "LOW",
          "attackVector": "NETWORK",
          "attackComplexity": "HIGH",
          "privilegesRequired": "NONE",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "LOW",
          "integrityImpact": "NONE",
          "availabilityImpact": "NONE"
        },
        "exploitabilityScore": 2.2,
        "impactScore": 1.4
      }
    ]
  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Primary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-74"
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://github.com/i18next/i18next-http-backend/commit/b0eef9efd425055c554787cef7f878de33bbf510",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/i18next/i18next-http-backend/releases/tag/v4.0.4",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/i18next/i18next-http-backend/security/advisories/GHSA-3cmx-xjww-583x",
      "source": "[email protected]"
    }
  ]
}