CVE-2026-33245: React Router is a router for React

Q: How do I fix CVE-2026-33245?

react-router: upgrade to 7.13.2. Exact commands for each OS are on this page.

Q: Is CVE-2026-33245 being exploited?

CVE-2026-33245 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-33245 affect?

CVE-2026-33245 affects react-router. Severity is high (CVSS 8.0). 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 handl

Routine

HIGH 8.0UPGRADE

CVE-2026-33245 is a high-severity flaw (CVSS 8.0) affecting react-router. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	8.0 (High)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.2% (top 92%)
CISA exploited list	No
Weakness	CWE-79
Published	2026-06-02
Last modified	2026-07-22

Publisher (CNA): GitHub, Inc. · Vendor: shopify

Last updated 2026-07-22 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-06-02 20:16 UTCPublished CVE record published
2026-07-22 19:10 UTCUpdated Record last modified

shopify react-router UPGRADE

Affected: >= 7.7.0 and < 7.13.2

Fixed in: 7.13.2

Safe to downgrade to: a release before 7.7.0

1. Check installed version

npm ls react-router

2. UPGRADE to 7.13.2

npm install react-router@">=7.13.2"

3. If no update is available yet, DOWNGRADE to a release before 7.7.0

npm view react-router versions npm install react-router@"<7.7.0"

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-33245?

react-router: upgrade to 7.13.2. Exact commands for each OS are on this page.

Is CVE-2026-33245 being exploited?

CVE-2026-33245 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-33245 affect?

CVE-2026-33245 affects react-router. Severity is high (CVSS 8.0). 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 handl

How urgent is CVE-2026-33245?

Priority 30/100. High severity

Software pages

React vulnerabilities · Shopify vulnerabilities

Related CVEs

CVE-2026-55685 HIGH 7.5 UPGRADE React Router is a router for React
CVE-2026-53667 MEDIUM 6.9 UPGRADE React Router is a router for React
CVE-2026-53668 MEDIUM 6.9 UPGRADE React Router is a router for React
CVE-2026-53666 MEDIUM 6.1 UPGRADE React Router is a router for React
CVE-2026-53669 MEDIUM 6.1 UPGRADE React Router is a router for React

References

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