{"id":"CVE-2026-49456","state":"PUBLISHED","title":"Waku: Open Redirect via `unstable_redirect` Helper","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.","publishedAt":"2026-09-03T18:15:54.213Z","updatedAt":"2026-09-03T18:29:02.239Z","severity":{"score":3.1,"label":"Low","version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N","source":"GitHub_M"},"assigner":"GitHub_M","products":["wakujs waku"],"affected":[{"vendor":"wakujs","product":"waku","versions":[{"version":"< 1.0.0-beta.1","status":"affected"}]}],"references":["https://github.com/wakujs/waku/security/advisories/GHSA-43fc-v873-qw85","https://github.com/wakujs/waku/pull/2090","https://github.com/wakujs/waku/releases/tag/v1.0.0-beta.1"],"weaknesses":["CWE-601"],"ingestedAt":"2026-10-29T20:12:07.131Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/49xxx/CVE-2026-49456.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-49456","state":"PUBLISHED","datePublished":"2026-09-03T18:15:54.213Z","dateUpdated":"2026-09-03T18:29:02.239Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-05-30T02:43:33.107Z"},"containers":{"cna":{"title":"Waku: Open Redirect via `unstable_redirect` Helper","descriptions":[{"lang":"en","value":"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":[{"vendor":"wakujs","product":"waku","versions":[{"version":"< 1.0.0-beta.1","status":"affected"}]}],"references":[{"url":"https://github.com/wakujs/waku/security/advisories/GHSA-43fc-v873-qw85","name":"https://github.com/wakujs/waku/security/advisories/GHSA-43fc-v873-qw85","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/wakujs/waku/pull/2090","name":"https://github.com/wakujs/waku/pull/2090","tags":["x_refsource_MISC"]},{"url":"https://github.com/wakujs/waku/releases/tag/v1.0.0-beta.1","name":"https://github.com/wakujs/waku/releases/tag/v1.0.0-beta.1","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":3.1,"baseSeverity":"LOW","confidentialityImpact":"NONE","integrityImpact":"LOW","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-601","lang":"en","description":"CWE-601: URL Redirection to Untrusted Site ('Open Redirect')","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-09-03T18:15:54.213Z"},"source":{"advisory":"GHSA-43fc-v873-qw85","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-09-03T18:28:38.059018Z","id":"CVE-2026-49456","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-09-03T18:29:02.239Z"}}]}}}