7.5

CVE-2026-42342: remix-run react-router Uncontrolled Resource Consumption

CVSS: 7.5v3.1HighAnalyzed
AliasesCGA-6gj3-3w4p-hg4hCGA-jr9q-6443-crwwGHSA-8x6r-g9mw-2r78
Published 02-06-2026Last modified 03-06-2026
Open JSON

Vulnerability summary

CVE-2026-42342 is a high (CVSS 7.5) Uncontrolled Resource Consumption vulnerability in remix-run react-router. EPSS estimates a 0.46% chance of exploitation in the next 30 days, higher than 38.5% of scored vulnerabilities.

Overall risk
30/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.5/10
010
High · v3.1 (CVE.org)
EPSS score
0.46%
0%100%
Low · +0.16 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 · Related 4
SUSE-SU-2026:4585-1SUSE-SU-2026:4606-1CGA-VRM5-W54C-82JFCVE-2026-55685

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 7.0.0 through 7.14.x of react-router and versions 2.10.0 through 2.17.4 of @remix-run/server-runtime, certain crafted requests can consume disproportionate server resources via unbounded path expansion in the __manifest endpoint, resulting in response time degradation and/or service unavailability for end users. This affects React Router Framework Mode applications as well as Remix applications. This does not impact applications using Declarative Mode (`<BrowserRouter>`) or Data Mode (`createBrowserRouter/<RouterProvider>`). This is patched in react-router version 7.15.0 and @remix-run/server-runtime version 2.17.5.

CVSS metrics

5 scores · 5 sources · 1 version

EPSS trend

Probability

0.46%

Chance of exploitation in the next 30 days

Percentile

39%

Versus all other CVEs

30-day change

+0.16 pp

From 0.30% on 20-09-2026

20-09-202620-10-2026
EPSS score
0.46%

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

Chainguard3 products
  • airflow-2All versions (No fix recorded)
  • airflow-core-2All versions (No fix recorded)
  • vitess-24< 24.0.1-r2
Remix-run2 products
Shopify2 products
@remix-run1 product
  • server-runtime≥ 2.10.0, < 2.17.5
Npm1 product
  • react-router≥ 7.0.0, < 7.15.0
Wolfi1 product
  • vitess-24< 24.0.1-r2

6 vendors · 10 products

References

4 links