How severe is CVE-2026-53721?

CVE-2026-53721 has a CVSS 3.x base score of 8.2, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity low, and availability none.

Is CVE-2026-53721 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (21st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-53721?

CVE-2026-53721 affects Nuxt. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-53721?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-53721 have an EU (EUVD) identifier?

Yes. CVE-2026-53721 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-36427.

When was CVE-2026-53721 published?

CVE-2026-53721 was published on 2026-06-12 and last updated on 2026-06-17.

CVE-2026-53721

CVE-2026-53721 is a high-severity vulnerability in Nuxt with a CVSS 3.x base score of 8.2. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-178.

Key facts

Severity: High (CVSS 3.x base score 8.2)
CVSS v4: 8.8
EPSS exploit prediction: 0% (21st percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-36427
Weakness: CWE-178
Affected product: Nuxt
Published: 2026-06-12
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2026-53721?: 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.
How severe is CVE-2026-53721?: CVE-2026-53721 has a CVSS 3.x base score of 8.2, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity low, and availability none.
Is CVE-2026-53721 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (21st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-53721?: CVE-2026-53721 affects Nuxt. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-53721?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-53721 have an EU (EUVD) identifier?: Yes. CVE-2026-53721 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-36427.
When was CVE-2026-53721 published?: CVE-2026-53721 was published on 2026-06-12 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:nuxt:nuxt:*:*:*:*:*:*:*:*

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