8

CVE-2026-33245: React Router vulnerable to XSS in unstable RSC redirect handling via javascript: redirect targets

Analyzed
AliasesGHSA-8646-j5j9-6r62CGA-39hg-hx29-h2gpCGA-48x7-r354-8mwq
Published 02-06-2026Last modified 03-06-2026

Vulnerability summary

CVE-2026-33245 is a high (CVSS 8.0) vulnerability in remix-run react-router. EPSS estimates a 0.19% chance of exploitation in the next 30 days, higher than 8.5% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 8, network access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
8.0/10
010
High · v3.1 (CVE.org)
EPSS score
0.19%
0%100%
Low · -0.04 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 1 · Related 1
OPENSUSE-SU-2026:11680-1

Timeline

  1. 02-06-2026
    PublishedVulnerability first disclosed.
  2. 03-06-2026
    Last modifiedVulnerability information updated.

Description

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 metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.19%

Chance of exploitation in the next 30 days

Percentile

9%

Versus all other CVEs

30-day change

Decrease -0.04 pp

From 0.23% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: network-reachable, no authentication, user interaction (CVSS vector). Other conditions: not stated in public data.

Chainguard2 products
  • airflow-2All versions (No fix recorded)
  • airflow-core-2All versions (No fix recorded)
Npm1 product
  • react-router≥ 7.7.0, < 7.13.2
Remix-run1 product
Shopify1 product

4 vendors · 5 products

References

4 links