CVE-2026-49456

The record

Waku is the minimal React framework. Prior to version 1.0.0-beta.1, the unstable_redirect() helper exported from waku/router/server (packages/waku/src/router/define-router.tsx:156–161) accepts an arbitrary string and reflects it unchanged into the HTTP Location response header with no URL validation, scheme restriction, or path-only enforcement. Any application that passes user-controlled input to this helper — the natural pattern documented in the JSDoc and official fixtures — is vulnerable to open redirect attacks. An attacker who convinces a victim to click a crafted link can silently redirect the browser to an arbitrary external domain, enabling phishing, credential harvesting, and OAuth token theft. Additionally, scheme-relative URLs (//evil.example/) bypass naive https?://-only allow-list filters that developers might add as ad-hoc mitigations. This issue has been patched in version 1.0.0-beta.1.

Affected packages

Related vulnerabilities

• CVE-2026-87945 URL Redirection to Untrusted Site ('Open Redirect') vulnerability in Drupal SAML SSO… CWE-601
• CVE-2026-87937 URL Redirection to Untrusted Site ('Open Redirect') vulnerability in Drupal Central… CWE-601
• CVE-2026-112034 A weakness has been identified in aircheng-org iWebShop-5 up to 5.16. CWE-601
• CVE-2026-101907 Axios is a promise-based HTTP client for the browser and Node.js. CWE-601
• CVE-2026-8323 URL redirection to untrusted site ('open redirect') vulnerability in Armiya Information… CWE-601
• CVE-2026-78377 URL redirection to untrusted site ('open redirect') vulnerability in Yordam Informatics… CWE-601
• CVE-2026-81741 The Groundhogg — CRM, Newsletters, and Marketing Automation WordPress plugin before 4.7.2… CWE-601
• CVE-2026-84389 A url redirection to untrusted site ('open redirect') vulnerability in Fortinet FortiSIEM… CWE-601