{"cve":"CVE-2026-49456","nvd":{"published":"2026-09-03T19:17:28.250","modified":"2026-09-09T20:20:21.673","status":"Deferred","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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N","score":3.1},"cwes":["CWE-601"],"references":["https://github.com/wakujs/waku/pull/2090","https://github.com/wakujs/waku/releases/tag/v1.0.0-beta.1","https://github.com/wakujs/waku/security/advisories/GHSA-43fc-v873-qw85"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:52:03.409947763+00:00"},"epss":{"cve":"CVE-2026-49456","score":0.00398,"percentile":0.34012,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-43fc-v873-qw85","url":"https://osv.dev/vulnerability/GHSA-43fc-v873-qw85","summary":"Waku has an Open Redirect via `unstable_redirect` Helper","modified":"2026-07-08T20:56:35.817296Z","packages":[{"ecosystem":"npm","name":"waku","purl":"pkg:npm/waku","ranges":["<1.0.0-beta.1"],"fixed":["1.0.0-beta.1"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}