6.9

CVE-2026-53667: remix-run react-router Cross-site Scripting

CVSS: 6.9v3.1MediumAnalyzed
AliasesCGA-2vr9-g4r7-hxc6CGA-9rxx-rv9c-mhrmCGA-f747-9wx2-4xq4
Published 27-07-2026Last modified 28-07-2026
Open JSON

Vulnerability summary

CVE-2026-53667 is a medium (CVSS 6.9) Cross-site Scripting vulnerability in remix-run react-router. EPSS estimates a 0.36% chance of exploitation in the next 30 days, higher than 27.7% of scored vulnerabilities.

Overall risk
28/100
0100
Medium · default modelHow is this calculated?
CVSS score
6.9/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.36%
0%100%
Low · +0.15 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 0 · Related 1
CGA-VX8F-F6Q8-MFH7

Timeline

  1. 27-07-2026
    PublishedVulnerability first disclosed.
  2. 28-07-2026
    Last modifiedVulnerability information updated.

Description

React Router is a router for React. In versions 7.11.0 through 7.17.0, the RSCErrorHandler is missing protocol validation, allowing for redirects from untrusted sources. This issue is a follow up to CVE-2026-53667, and only affects consuming applications if they are using the unstable RSC APIs. This issue has been fixed in version 7.18.0.

CVSS metrics

5 scores · 5 sources · 1 version

EPSS trend

Probability

0.36%

Chance of exploitation in the next 30 days

Percentile

28%

Versus all other CVEs

30-day change

+0.15 pp

From 0.20% on 20-09-2026

20-09-202620-10-2026
EPSS score
0.36%

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

Chainguard4 products
  • airflow-2All versions (No fix recorded)
  • airflow-core-2All versions (No fix recorded)
  • vitess-24< 24.0.2-r7
  • vitess-24-compat< 24.0.3-r7
Wolfi2 products
  • vitess-24< 24.0.2-r7
  • vitess-24-compat< 24.0.3-r7
Npm1 product
  • react-router≥ 7.11.0, < 7.18.0
Remix-run1 product
Shopify1 product

5 vendors · 9 products

References

8 links