CVE-2026-49456
Dashboard / Vulnerabilities / CVE-2026-49456
Summary: Waku: Open Redirect via `unstable_redirect` Helper
Details: 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.
References: https://github.com/wakujs/waku/releases/tag/v1.0.0-beta.1, https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/49xxx/CVE-2026-49456.json, https://github.com/wakujs/waku/security/advisories/GHSA-43fc-v873-qw85, https://nvd.nist.gov/vuln/detail/CVE-2026-49456, https://github.com/wakujs/waku/pull/2090
Affected packages
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