CVE-2026-33245

mediumpriority · track · 19EPSS 0.002 · 8 %ileEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.19% (8th) EPSS

CVSS 4.7 · medium

Is it mine?

3 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · nvd · osv

EPSS · scored 2026-10-27

React Router is a router for React. In versions 7.7.0 through 7.13.1, when using React Router's unstable React Server Components (RSC) APIs, there is a potential client-side Cross-Site Scripting (XSS) vulnerability in the RSC redirect handling if redirects come from untrusted sources. This does not impact applications that are not using the unstable RSC APIs in React Router. This is patched in version 7.13.2.

cvss

Technical severity, 0–10. One row per scoring source.

8.0

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 4.3–8

v3.14.7mediumCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:Nprimary · NVD / NIST USexploitability 1.6 · impact 2.7

v3.18highCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:Nsecondary · ENISA EU

v3.18highCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:Nsecondary · security-advisories@github.comexploitability 1.6 · impact 5.8

v3.18highCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:Nsecondary · OSV

v3.14.3mediumCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N/E:Usecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Trackcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-79USCWE-79US

affected products (3)

Products and version ranges known to be affected.

remix-run react-router7.7.0, → 7.13.2enisa_euvdEU
shopify react-router7.7.0 → 7.13.2nvdUScpe:2.3:a:shopify:react-router:*:*:*:*:*:*:*:*
npm react-router7.7.0 → 7.13.2osvUSpkg:npm/react-router

advisories (1)

Vendor and ecosystem advisories describing this.

GHSA-8646-j5j9-6r62React Router vulnerable to XSS in unstable RSC redirect handling via javascript: redirect targets2026-06-03ghsa · osvUS
When using React Router v7's unstable RSC APIs, there exists a potential client-side XSS issue in the RSC redirect handling if redirects are coming from untrusted sources > [!NOTE] > This only impacts your application if you are using the unstable RSC APIs in React Router.

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd nvd osv NVD CVE.org MITRE

published 2026-06-02modified 2026-07-22

references (4)

External citations — patches, advisories, analysis.

scry

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