Cross-Site Request Forgery (CSRF) in react-router (CVE-2026-53663)
Summary
Vulnerability in react-router (CVE-2026-53663). Risk of unauthorized operations or information disclosure. Exploitable via createBrowserRouter. Mitigation: upgrade to 7.15.1 or later.
Original description
The description as published by the source.
React Router is a router for React. From 7.12.0 until 7.15.1, certain CSRF checks in React Router v7 Framework Mode were insufficient and run on POST requests, but were bypassed on PUT/PATCH/DELETE requests. This is a low severity vulnerability because modern browser protections (CORS preflight, SameSite cookies) already block the cross-origin attack vectors that this missing CSRF check would otherwise gate. This vulnerability is fixed in 7.15.1.
Source: GitHub Security Advisories (Global) NVD GitHub Advisory
Auto-generated summary
Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.
A vulnerability tracked as CVE-2026-53663 has been found in react-router.
Attackers can target a specific entry point like createBrowserRouter over the network to misuse the product.
Risk of unauthorized operations or information disclosure. CVSS score: 3.1/10.
What to do: upgrade react-router to 7.15.1 or later.
If unsure, ask your IT team or search "react-router CVE-2026-53663" on the vendor's site.
CVE-2026-53663 (react-router) — CWE-352 / CVSS v3 3.1
Attack vector: remote (network-reachable) / unauthenticated
Attack surface: createBrowserRouter
Patched: 7.15.1 — apply immediately
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.
CSRF (CWE-352) exists in react-router. Attackers reach the vulnerable code path via createBrowserRouter without authentication.
Check the vendor advisory for the affected versions of react-router. Attack surface: createBrowserRouter.
Severity: Low (CVSS 3.1/10). Risk of unauthorized operations or information disclosure.
Update to 7.15.1.
Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Run grep -r 'react-router' . against your dependency files (package-lock.json, requirements.txt, go.sum) to find affected services.
Response actions
Concrete steps and command examples for SOC/SRE teams to execute in order
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1Identify exposure identify
grep -r 'react-router' . | grep -v node_modulesリポジトリと本番環境の依存ファイル (package-lock.json / requirements.txt / go.sum / Gemfile.lock 等) で
react-routerを grep し、稼働しているサービス・バージョンを把握する。 -
2Apply patch patch
Upgrade react-router to 7.15.1ステージング環境で 7.15.1 に上げて回帰テスト → 本番反映。回帰テストはアプリの主要ハッピーパスを含めること。
-
3Post-deployment verification verify
Confirm patched version is live in productionパッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。
Affected packages
References
- advisory github.com
- advisory github.com
- advisory nvd.nist.gov
- package github.com
- web github.com