{"id":"CVE-2026-49455","state":"PUBLISHED","title":"Waku: Cross-Origin CSRF on RSC Server Action Dispatch","description":"Waku is the minimal React framework. Prior to version 1.0.0-beta.1, Waku's RSC request dispatcher invokes server actions without validating the request's Origin (or Sec-Fetch-Site) header. A cross-origin web attacker can therefore cause a victim browser to issue an authenticated POST to a registered server action endpoint using a CORS-safelisted content type (text/plain), which does not trigger a preflight. Any state-mutating server action that the application exposes via 'use server' can be invoked with the victim's cookies attached. This issue has been patched in version 1.0.0-beta.1.","publishedAt":"2026-09-03T18:15:42.014Z","updatedAt":"2026-09-03T18:34:19.918Z","severity":{"score":6.5,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/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-75w3-gmqx-993q","https://github.com/wakujs/waku/releases/tag/v1.0.0-beta.1"],"weaknesses":["CWE-352"],"ingestedAt":"2026-10-29T20:12:07.131Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/49xxx/CVE-2026-49455.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-49455","state":"PUBLISHED","datePublished":"2026-09-03T18:15:42.014Z","dateUpdated":"2026-09-03T18:34:19.918Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-05-30T02:43:33.107Z"},"containers":{"cna":{"title":"Waku: Cross-Origin CSRF on RSC Server Action Dispatch","descriptions":[{"lang":"en","value":"Waku is the minimal React framework. Prior to version 1.0.0-beta.1, Waku's RSC request dispatcher invokes server actions without validating the request's Origin (or Sec-Fetch-Site) header. A cross-origin web attacker can therefore cause a victim browser to issue an authenticated POST to a registered server action endpoint using a CORS-safelisted content type (text/plain), which does not trigger a preflight. Any state-mutating server action that the application exposes via 'use server' can be invoked with the victim's cookies attached. 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-75w3-gmqx-993q","name":"https://github.com/wakujs/waku/security/advisories/GHSA-75w3-gmqx-993q","tags":["x_refsource_CONFIRM"]},{"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":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":6.5,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-352","lang":"en","description":"CWE-352: Cross-Site Request Forgery (CSRF)","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-09-03T18:15:42.014Z"},"source":{"advisory":"GHSA-75w3-gmqx-993q","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-09-03T18:32:58.949158Z","id":"CVE-2026-49455","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":"2026-09-03T18:34:19.918Z"}}]}}}