What is CVE-2026-53663?

CVE-2026-53663 is a low-severity vulnerability in @Remix-run Server-runtime, classified under Cross-Site Request Forgery (CSRF). CVSS score: 3.1/10. Published 2026-06-22.

How severe is CVE-2026-53663?

Low severity. CVSS v3 base score is 3.1 out of 10.

CSRF in @Remix-run Server-runtime

CVE-2026-53663

React Router is a router for React. From 7.12.0 until 7.15.1, certain CSRF checks in React Router v7 Framework Mode were insufficient and run on POST requests, but were bypassed on PUT/PATCH/DELETE requests. This is a low severity vulnerab…

Vulnerability class: CSRF (Cross-Site Request Forgery)

CVSS v3 metric

CVSS v3 base score 3.1 (Low). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N.

Affected products

@Remix-run Server-runtime — versions >= 2.17.3, < 2.17.5
Remix-run React-router — versions >= 7.12.0, < 7.15.1

Weakness classification (CWE)

CWE-352 — Cross-Site Request Forgery (CSRF)

References

security-advisories@github.com (x_refsource_CONFIRM)

Frequently asked questions

What is CVE-2026-53663?: CVE-2026-53663 is a low-severity vulnerability in @Remix-run Server-runtime, classified under Cross-Site Request Forgery (CSRF). CVSS score: 3.1/10. Published 2026-06-22.
How severe is CVE-2026-53663?: Low severity. CVSS v3 base score is 3.1 out of 10.