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Vulnerabilities

Vulnerability · CVE-2026-22029

@remix-run/router: react-router: React Router vulnerable to XSS via Open Redirects

Published Oct 16, 2026 · Red Hat

Check if you run it

No confirmed exploitation is on record for CVE-2026-22029. EPSS is 0.87%. Act only if a listed version of Red Hat is installed.

Gaps on this record

  • No version range is stored. A customer cannot check an installed version against this record.
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
High8.0
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.87%
Remediation
Advisory link
Affected products
Red Hat

A cross site scripting flaw has been discovered in the npm react-router and @remix-run/router packages. React Router (and Remix v1/v2) SPA open navigation redirects originating from loaders or actions in Framework Mode, Data Mode, or the unstable RSC modes can result in unsafe URLs causing unintended javascript execution on the client. This is only an issue if you are creating redirect paths from untrusted content or via an open redirect.

No affected version ranges are stored yet. Use the vendor advisory before you decide this record does not apply.

How to fix CVE-2026-22029

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-22029. EPSS is 0.87%. Act only if a listed version of Red Hat is installed.

Which versions are affected?

Affected version ranges are not on this record. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 0.87%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Oct 16, 2026 · CSAF Advisories

    Detected

    A cross site scripting flaw has been discovered in the npm react-router and @remix-run/router packages. React Router (and Remix v1/v2) SPA open navigation redirects originating from loaders or actions in Framework Mode, Data Mode, or the unstable RSC modes can result in unsafe URLs causing unintended javascript execution on the client. This is only an issue if you are creating redirect paths from

Sources

  • CSAF AdvisoriesVendor advisoryRHSA-2026:9848:CVE-2026-22029

    A cross site scripting flaw has been discovered in the npm react-router and @remix-run/router packages. React Router (and Remix v1/v2) SPA open navigation redirects originating from loaders or actions in Framework Mode, Data Mode, or the unstable RSC modes can result in unsafe UR

    security.access.redhat.com
  • CVE.orgVulnerability recordCVE-2026-22029

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-22029

    30-day exploitation probability 0.9%

    first.org

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.