{"id":"CVE-2026-49455","summary":"Waku: Cross-Origin CSRF on RSC Server Action Dispatch","details":"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.","aliases":["GHSA-75w3-gmqx-993q"],"modified":"2026-09-05T03:48:02.012205602Z","published":"2026-09-03T18:15:42.014Z","database_specific":{"cwe_ids":["CWE-352"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/49xxx/CVE-2026-49455.json","cna_assigner":"GitHub_M"},"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-2026-49455.json"},{"type":"ADVISORY","url":"https://github.com/wakujs/waku/security/advisories/GHSA-75w3-gmqx-993q"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-49455"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/wakujs/waku","events":[{"introduced":"0"},{"fixed":"5a5f4a48ba18c004d4552cbee15d0e3e1f8ea371"}],"database_specific":{"extracted_events":[{"introduced":"0"},{"fixed":"1.0.0-beta.1"}],"source":["AFFECTED_FIELD","REFERENCES"]}}],"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-2026-49455.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N"}]}