8

CVE-2026-22029: remix-run react-router Cross-site Scripting

CVSS: 8.0v3.1HighModified
AliasesGHSA-2w69-qvjg-hvjxopenSUSE-SU-2026:10069-1
Published 10-01-2026Last modified 10-09-2026
Open JSON

Vulnerability summary

CVE-2026-22029 is a high (CVSS 8.0) Cross-site Scripting vulnerability in remix-run react-router. EPSS estimates a 0.87% chance of exploitation in the next 30 days, higher than 58% of scored vulnerabilities.

Overall risk
32/100
0100
Medium · default modelHow is this calculated?
CVSS score
8.0/10
010
High · v3.1 (CVE.org)
EPSS score
0.87%
0%100%
Low · -0.01 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 2
RHSA-2026:3958RHSA-2026:3959

Timeline

  1. 10-01-2026
    PublishedVulnerability first disclosed.
  2. 10-09-2026
    Last modifiedVulnerability information updated.

Description

React Router is a router for React. In @remix-run/router version prior to 1.23.2 and react-router 7.0.0 through 7.11.0, React Router (and Remix v1/v2) SPA open navigation redirects originating from loaders or actions in Framework Mode, Data Mode, or the unstable RSC modes can result in unsafe URLs causing unintended javascript execution on the client. This is only an issue if you are creating redirect paths from untrusted content or via an open redirect. There is no impact if Declarative Mode (<BrowserRouter>) is being used. This issue has been patched in @remix-run/router version 1.23.2 and react-router version 7.12.0.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.87%

Chance of exploitation in the next 30 days

Percentile

58%

Versus all other CVEs

30-day change

-0.01 pp

From 0.88% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.87%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Remix-run2 products
Shopify2 products
@remix-run1 product
  • router< 1.23.2
Npm1 product
  • react-router≥ 7.0.0, < 7.12.0
Opensuse1 product
  • heroic-games-launcher&distro=openSUSE Tumbleweed< 2.18.1-2.1

5 vendors · 7 products

References

45 links
Show all 45 references