6.6

CVE-2026-40181: remix-run react-router Open Redirect

CVSS: 6.6v4.0MediumAnalyzed
AliasesCGA-7cj2-j79p-5mv7CGA-89g7-86pv-x6frCGA-96m5-x9g9-r4xg
Published 02-06-2026Last modified 04-08-2026
Open JSON

Vulnerability summary

CVE-2026-40181 is a medium (CVSS 6.6) Open Redirect vulnerability in remix-run react-router. EPSS estimates a 0.27% chance of exploitation in the next 30 days, higher than 18.5% of scored vulnerabilities.

Overall risk
26/100
0100
Medium · default modelHow is this calculated?
CVSS score
6.6/10
010
Medium · v4.0 (CVE.org)
EPSS score
0.27%
0%100%
Low · +0.06 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 3 · Related 4
OPENSUSE-SU-2026:21448-1SUSE-SU-2026:4585-1SUSE-SU-2026:4606-1CGA-8GRF-WHVR-G8V7

Timeline

  1. 02-06-2026
    PublishedVulnerability first disclosed.
  2. 04-08-2026
    Last modifiedVulnerability information updated.

Description

React Router is a router for React. In versions 7.0.0 through 7.14.0 and 6.7.0 through 6.30.3, certain URLs passed to the redirect function can trigger an open redirect to an external domain due to path values starting with // being reinterpreted as protocol-relative URLs. The level of impact depends on the validation done by the application prior to returning the redirect. This does not impact applications using Declarative Mode (<BrowserRouter>). This is patched in versions 7.14.1 and 6.30.4.

CVSS metrics

6 scores · 5 sources · 2 versions

EPSS trend

Probability

0.27%

Chance of exploitation in the next 30 days

Percentile

19%

Versus all other CVEs

30-day change

+0.06 pp

From 0.21% on 20-09-2026

20-09-202620-10-2026
EPSS score
0.27%

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

Chainguard7 products
  • airflow-2All versions (No fix recorded)
  • airflow-core-2All versions (No fix recorded)
  • keycloak-26.5< 26.5.7-r3
  • keycloak-26.5-iamguarded-compat< 26.5.7-r3
  • keycloak-26.6< 26.6.4-r14
Wolfi5 products
  • keycloak-26.5< 26.5.7-r3
  • keycloak-26.5-iamguarded-compat< 26.5.7-r3
  • keycloak-26.6< 26.6.4-r14
  • keycloak-26.6-iamguarded-compat< 26.6.4-r14
  • vitess-24< 24.0.1-r2
Remix-run2 products
@remix-run1 product
  • router≥ 1.3.0, < 1.23.3
Npm1 product
  • react-router≥ 7.0.0, < 7.14.1 | ≥ 6.7.0, < 6.30.4
Shopify1 product

6 vendors · 17 products

References

5 links