# CVE-2026-49456

## Summary

- **CVE ID:** CVE-2026-49456
- **Severity:** LOW
- **CVSS Score:** 3.1 (CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N)
- **CWE:** CWE-601
- **Published:** Sep 3, 2026
- **Last Modified:** Sep 3, 2026

## Description

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 Products

- wakujs — waku (< 1.0.0-beta.1)

## References

- [CNA](https://github.com/wakujs/waku/security/advisories/GHSA-43fc-v873-qw85)
- [CNA](https://github.com/wakujs/waku/pull/2090)
- [CNA](https://github.com/wakujs/waku/releases/tag/v1.0.0-beta.1)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.30%
- **EPSS Percentile:** 22.3

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-10._