Publish GHSA-8f24-v5vv-gm5j

Author: advisory-database[bot]

advisories/github-reviewed/2026/04/GHSA-8f24-v5vv-gm5j/GHSA-8f24-v5vv-gm5j.json

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+{
+  "schema_version": "1.4.0",
+  "id": "GHSA-8f24-v5vv-gm5j",
+  "modified": "2026-04-10T21:03:55Z",
+  "published": "2026-04-10T21:03:55Z",
+  "aliases": [],
+  "summary": "next-intl has an open redirect vulnerability",
+  "details": "### Impact\n\nApplications using the `next-intl` middleware with `localePrefix: 'as-needed'` could construct URLs where path handling and the WHATWG URL parser resolved a relative redirect target to another host (e.g. scheme-relative `//` or control characters stripped by the URL parser), so the middleware could redirect the browser off-site while the user still started from a trusted app URL.\n\n### Patches\n\nThe problem has been patched, please update to [`next-intl@4.9.1`](https://github.com/amannn/next-intl/releases/tag/v4.9.1).\n\n### Credits\n\nMany thanks to [Joni Liljeblad](https://github.com/joniumGit) from [Oura](https://ouraring.com) for responsibly disclosing the vulnerability and for suggesting the fix.",
+  "severity": [
+    {
+      "type": "CVSS_V4",
+      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N"
+    }
+  ],
+  "affected": [
+    {
+      "package": {
+        "ecosystem": "npm",
+        "name": "next-intl"
+      },
+      "ranges": [
+        {
+          "type": "ECOSYSTEM",
+          "events": [
+            {
+              "introduced": "0"
+            },
+            {
+              "fixed": "4.9.1"
+            }
+          ]
+        }
+      ]
+    }
+  ],
+  "references": [
+    {
+      "type": "WEB",
+      "url": "https://github.com/amannn/next-intl/security/advisories/GHSA-8f24-v5vv-gm5j"
+    },
+    {
+      "type": "WEB",
+      "url": "https://github.com/amannn/next-intl/pull/2304"
+    },
+    {
+      "type": "WEB",
+      "url": "https://github.com/amannn/next-intl/commit/1c80b668aa6d853f470319eec10a3f61e78a70e6"
+    },
+    {
+      "type": "PACKAGE",
+      "url": "https://github.com/amannn/next-intl"
+    },
+    {
+      "type": "WEB",
+      "url": "https://github.com/amannn/next-intl/releases/tag/v4.9.1"
+    }
+  ],
+  "database_specific": {
+    "cwe_ids": [
+      "CWE-601"
+    ],
+    "severity": "MODERATE",
+    "github_reviewed": true,
+    "github_reviewed_at": "2026-04-10T21:03:55Z",
+    "nvd_published_at": null
+  }
+}