SEPTEMBER 17, 2026
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Case File

CVE-2026-49455

MEDIUM · CVSS 6.5 EPSS 0.12% Public Exploit

Source: NVD + CISA KEV + EPSS · Published 2026-09-03 · Last synced 2026-09-17

CyberRota Analysis

AI-Generated

Waku's RSC request dispatcher prior to version 1.0.0-beta.1 is vulnerable to cross-origin request forgery due to inadequate validation of the Origin or Sec-Fetch-Site headers, allowing attackers to exploit authenticated POST requests. This could lead to unauthorized state mutations on the server using the victim's cookies. Developers and organizations utilizing Waku should prioritize upgrading to version 1.0.0-beta.1 to mitigate this risk.

Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

Note: these links are listed for security research and verification purposes only.

CVE
CVE-2026-49455
Severity
MEDIUM
CVSS
6.5
EPSS
0.12%

Original NVD 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.