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CVE-2026-34077

33
FAUCET Score

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.

First published: Jun 2, 2026Last modified: Jun 2, 2026

Impacted Technologies

VendorProductVersion(s)CPE
>= 7.0.0, < 7.14.0CPE matchmatch criteria
cpe:2.3:a:shopify:react-router:*:*:*:*:*:node.js:*:*
< 3.0.0CPE matchmatch criteria
cpe:2.3:a:turbo-stream:turbo_stream:*:*:*:*:*:node.js:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.29%
Probability of exploitation in next 30 days
EPSS Percentile
21.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0029 is in the 5th percentile among its peer group of 51,485 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (3)

npmpatch availablevia ghsa
Product: react-routerFixed in: 7.14.0
npmpatch availablevia ghsa
Product: turbo-streamFixed in: 3.0.0
github_advisoryvendor investigatingvia nvd_reference
View patch

Vendor Advisories (1)

npmGHSA-rxv8-25v2-qmq8high

React Router vulnerable to Denial of Service via reflected user input in single-fetch

Jun 4, 2026

References

github.com / remix-run/react-router/security/advisories/GHSA-rxv8-25v2-qmq8
Vendor Advisory