CVE-2026-53666

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Source
https://cve.org/CVERecord?id=CVE-2026-53666
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-53666.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-53666
Aliases
Downstream
Published
2026-07-27T21:14:49.547Z
Modified
2026-07-28T04:02:41.214284349Z
Severity
  • 6.1 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N CVSS Calculator
Summary
React Router: Arbitrary Constructor Injection via deserializeErrors() in React Router SSR Hydration
Details

React Router is a router for React. In versions 6.4.0 through 7.17.0, if application code was written in a way that allows attacker-supplied input to overwrite certain aspects of errors caught by the SSR process, then it was possible for an attacker to trigger unexpected constructor execution on the client, which would in turn trigger an outbound network request. This is only possible with very specific (and unlikely) application-layer code. Note that this does not impact an application if it is using Declarative Mode. It only impacts Framework Mode and Data Mode applications that perform manual SSR/hydration. This issue has been fixed in version 7.18.0.

Database specific 
{
    "cna_assigner": "GitHub_M",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53666.json",
    "cwe_ids": [
        "CWE-470"
    ]
}
References

Affected packages

Git / github.com/remix-run/react-router

Affected ranges

Type
GIT
Repo
https://github.com/remix-run/react-router
Events
Introduced
87851fbafee8932b9624900789388cdee9b1488a
Fixed
24283e93971e3e4f9f909c0bae63583f173fcd52
Database specific 
{
    "extracted_events": [
        {
            "introduced": "6.4.0"
        },
        {
            "fixed": "7.18.0"
        }
    ],
    "source": "AFFECTED_FIELD"
}

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-53666.json"