EUVD-2026-19888
GHSA-x8rx-789c-2pxq
CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H
Lifecycle Timeline
4Tags
Description
RedwoodSDK is a server-first React framework. From 1.0.0-beta.50 to 1.0.5, erver functions exported from "use server" files could be invoked via GET requests, bypassing their intended HTTP method. In cookie-authenticated applications, this allowed cross-site GET navigations to trigger state-changing functions, because browsers send SameSite=Lax cookies on top-level GET requests. This affected all server functions -- both serverAction() handlers and bare exported functions in "use server" files. This vulnerability is fixed in 1.0.6.
Analysis
Cross-Site Request Forgery (CSRF) in RedwoodSDK 1.0.0-beta.50 through 1.0.5 allows unauthenticated remote attackers to execute state-changing server functions via crafted GET requests. The vulnerability stems from server functions exported from 'use server' files accepting GET requests despite being intended for POST-only invocation, enabling exploitation through cross-site navigation in cookie-authenticated applications where browsers automatically attach SameSite=Lax cookies to top-level GET requests. …
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Remediation
Within 24 hours: Identify all applications and services using RedwoodSDK 1.0.0-beta.50 through 1.0.5 and document affected systems. Within 7 days: Upgrade to RedwoodSDK 1.0.6 or later on all affected deployments. …
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