8.8

CVE-2026-53721: nuxt Improper Handling of Case Sensitivity

CVSS: 8.8v4.0HighAnalyzed
AliasesGHSA-mm7m-92g8-7m47
Published 12-06-2026Last modified 13-06-2026
Open JSON

Vulnerability summary

CVE-2026-53721 is a high (CVSS 8.8) Improper Handling of Case Sensitivity vulnerability in nuxt. EPSS estimates a 0.51% chance of exploitation in the next 30 days, higher than 42.7% of scored vulnerabilities.

Overall risk
35/100
0100
Medium · default modelHow is this calculated?
CVSS score
8.8/10
010
High · v4.0 (CVE.org)
EPSS score
0.51%
0%100%
Low · +0.11 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 12-06-2026
    PublishedVulnerability first disclosed.
  2. 13-06-2026
    Last modifiedVulnerability information updated.

Description

Nuxt is an open-source web development framework for Vue.js. From versions 3.11.0 to before 3.21.7 and 4.0.0 to before 4.4.7, there is a route-rule middleware bypass via case-sensitivity mismatch between vue-router and the routeRules matcher. This issue has been patched in versions 3.21.7 and 4.4.7.

CVSS metrics

4 scores · 3 sources · 2 versions

EPSS trend

Probability

0.51%

Chance of exploitation in the next 30 days

Percentile

43%

Versus all other CVEs

30-day change

+0.11 pp

From 0.40% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.51%

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

Npm1 product
  • nuxt≥ 4.0.0, < 4.4.7 | ≥ 3.11.0, < 3.21.7
Nuxt1 product
  • nuxt≥ 3.11.0, < 3.21.7 | ≥ 4.0.0, < 4.4.7

2 vendors · 2 products

References

5 links