CVE-2026-53666React Router is a router for React.
Updated under an hour ago ()
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It affects shopify react-router. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 6.1 MEDIUM (v3.1, NVD)CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
- Weakness (CWE)
- CWE-470
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Not given
- NVD analysis
- Analyzed
- Record last updated
- Aug 3, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
shopify react-router shopify:react-router | from 6.4.0 before 7.18.0 | NVD |
References
- https://github.com/remix-run/react-router/blob/main/CHANGELOG.md#v7180release-notes
- https://github.com/remix-run/react-router/commit/9d22943fd46c8ae4b08236425fa3549e10e9ad1apatch
- https://github.com/remix-run/react-router/pull/15175issue-tracking, patch
- https://github.com/remix-run/react-router/releases/tag/react-router@7.18.0release-notes
- https://github.com/remix-run/react-router/security/advisories/GHSA-337j-9hxr-rhxgthird-party-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.