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.
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Affected Vendors & Products
References
History
Thu, 03 Sep 2026 19:30:00 +0000
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ssvc
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Thu, 03 Sep 2026 18:30:00 +0000
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| 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. | |
| Title | Waku: Cross-Origin CSRF on RSC Server Action Dispatch | |
| Weaknesses | CWE-352 | |
| References |
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| Metrics |
cvssV3_1
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Status: PUBLISHED
Assigner: GitHub_M
Published:
Updated: 2026-09-03T18:34:19.918Z
Reserved: 2026-05-30T02:43:33.107Z
Link: CVE-2026-49455
Updated: 2026-09-03T18:34:07.524Z
Status : Received
Published: 2026-09-03T19:17:28.100
Modified: 2026-09-03T19:17:28.100
Link: CVE-2026-49455
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OpenCVE Enrichment
No data.