Cross-site request forgery in server-runtime - CVE-2026-22030
Published: June 19, 2026
Vulnerability identifier: #VU134928
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-22030
CWE-ID: CWE-352
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Remix
Affected software:
server-runtime
server-runtime
Detailed vulnerability description
The vulnerability allows a remote attacker to perform cross-site request forgery attacks.
The vulnerability exists due to origin validation error in action and server action request processing when handling document POST requests to UI routes. A remote attacker can cause the victim's browser to send a crafted cross-site request to perform cross-site request forgery attacks.
The issue affects applications using server-side route action handlers in framework mode or React Server Actions in unstable RSC modes. Declarative mode and data mode are not affected.
How to mitigate CVE-2026-22030
Install security update from vendor's website.