{"id":"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.","aliases":["GHSA-43fc-v873-qw85"],"modified":"2026-09-05T03:48:02.012410819Z","published":"2026-09-03T18:15:54.213Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/49xxx/CVE-2026-49456.json","cna_assigner":"GitHub_M","cwe_ids":["CWE-601"]},"references":[{"type":"WEB","url":"https://github.com/wakujs/waku/releases/tag/v1.0.0-beta.1"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/49xxx/CVE-2026-49456.json"},{"type":"ADVISORY","url":"https://github.com/wakujs/waku/security/advisories/GHSA-43fc-v873-qw85"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-49456"},{"type":"FIX","url":"https://github.com/wakujs/waku/pull/2090"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/wakujs/waku","events":[{"introduced":"0"},{"fixed":"5a5f4a48ba18c004d4552cbee15d0e3e1f8ea371"}],"database_specific":{"source":["AFFECTED_FIELD","REFERENCES"],"extracted_events":[{"introduced":"0"},{"fixed":"1.0.0-beta.1"}]}}],"versions":["v1.0.0-beta.0","v1.0.0-alpha.10","v1.0.0-alpha.9","v1.0.0-alpha.8","v1.0.0-alpha.7","v1.0.0-alpha.6","v1.0.0-alpha.5","v1.0.0-alpha.4","v1.0.0-alpha.3","v1.0.0-alpha.2","v1.0.0-alpha.1","v1.0.0-alpha.0","v0.27.5","v0.27.4","v0.27.3","v0.27.2","v0.27.1","v0.27.0","v0.26.1","v0.26.0","v0.26.0-alpha.2","v0.26.0-alpha.1","v0.26.0-alpha.0","v0.25.0","v0.25.0-alpha.1","v0.25.0-alpha.0","v0.24.0","v0.24.0-alpha.0","v0.23.7","v0.23.6","v0.23.5","v0.23.4","v0.23.3","v0.23.2","v0.23.1","v0.23.0","v0.22.4","v0.22.3","v0.22.2","v0.22.1","v0.22.0","v0.21.24","v0.21.23","v0.21.22","v0.21.21","v0.21.20","v0.21.19","v0.21.18","v0.21.17","v0.21.16","v0.21.15","v0.21.14","v0.21.13","v0.21.12","v0.21.11","v0.21.10","v0.21.9","v0.21.8","v0.21.7","v0.21.6","v0.21.5","v0.21.4+v0.10.3","v0.21.4","v0.21.3+v0.10.1","v0.21.3","v0.21.2","v0.21.1","v0.21.0","v0.21.0-beta.5","v0.21.0-beta.4","v0.21.0-beta.3","v0.21.0-beta.2","v0.21.0-beta.1","v0.21.0-beta.0","v0.21.0-alpha.2","v0.21.0-alpha.1","v0.21.0-alpha.0","v0.20.2","v0.20.2-alpha.1","v0.20.2-alpha.0","v0.20.1","v0.20.1-alpha.0","v0.20.0","v0.20.0-beta.3","v0.20.0-beta.2","v0.20.0-beta.1","v0.20.0-beta.0","v0.20.0-alpha.2","v0.20.0-alpha.1","v0.20.0-alpha.0","v0.19.4","v0.19.3","v0.19.2","v0.19.1","v0.19.0","v0.19.0-beta.3","v0.19.0-beta.2","v0.19.0-beta.1","v0.19.0-beta.0","v0.19.0-alpha.2","v0.19.0-alpha.1","v0.19.0-alpha.0","v0.18.1","v0.18.0","v0.18.0-beta.0","v0.18.0-alpha.1","v0.18.0-alpha.0","v0.17.1+v0.6.5","v0.17.1+v0.6.4","v0.17.1","v0.17.0+v0.6.2","v0.17.0","v0.16.0","v0.15.1","v0.15.0+v0.5.2","v0.15.0","v0.14.0","v0.13.0","v0.12.1","v0.12.0","v0.11.3","v0.11.2","v0.11.1","v0.11.0","v0.10.0","v0.9.4","v0.9.3","v0.9.2","v0.9.1","v0.9.0","v0.8.3","v0.8.2","v0.8.1","v0.8.0","v0.7.2","v0.7.1","v0.7.0","v0.6.1","v0.6.0","v0.5.0","v0.4.0","v0.3.0","v0.2.0","v0.1.3","v0.1.2","v0.1.1","v0.1.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-49456.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N"}]}