CVE-2026-53721: Nuxt is an open-source web development framework for Vue.js

This month

HIGH 8.2REMOTEUPGRADE

CVE-2026-53721 is a high-severity flaw (CVSS 8.2) affecting nuxt. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

High severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	8.2 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.4% (top 66%)
CISA exploited list	No
Weakness	CWE-178, CWE-863
Published	2026-06-12
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: nuxt

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-06-12 15:16 UTCPublished CVE record published
2026-06-17 10:58 UTCUpdated Record last modified

nuxt nuxt UPGRADE

Affected: >= 3.11.0 and < 3.21.7 · >= 4.0.0 and < 4.4.7

Fixed in: 3.21.7, 4.4.7

Safe to downgrade to: a release before 3.11.0

1. Check installed version

apt-cache policy nuxt || rpm -q nuxt || nuxt --version

2. UPGRADE to 3.21.7 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade nuxt

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade nuxt

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 3.11.0 (Debian / Ubuntu)

apt-cache madison nuxt sudo apt install nuxt=<VERSION_BEFORE_3.11.0> sudo apt-mark hold nuxt

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list nuxt sudo dnf downgrade nuxt-<VERSION_BEFORE_3.11.0> sudo dnf versionlock add nuxt

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-53721?

nuxt: upgrade to 3.21.7, 4.4.7. Exact commands for each OS are on this page.

Is CVE-2026-53721 being exploited?

CVE-2026-53721 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-53721 affect?

CVE-2026-53721 affects nuxt. Severity is high (CVSS 8.2). 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 matche

How urgent is CVE-2026-53721?

Priority 42/100. High severity; Remotely exploitable, no login, no user action

Software pages

Vue.js vulnerabilities

Related CVEs

CVE-2026-56326 MEDIUM 6.1 UPGRADE Nuxt versions 4.0.0 before 4.4.7 and 3.x before 3.21.7 contain a server-side open redirect vulnerability in na
CVE-2026-56301 MEDIUM 5.5 UPGRADE Nuxt 4.0.0 before 4.4.7 and 3.18.0 before 3.21.7, when running the development server (nuxt dev) on Linux, bin
CVE-2026-56698 MEDIUM 6.1 UPGRADE Nuxt versions 4.0.0 before 4.4.7 and 3.x before 3.21.7 fail to validate script-capable URLs in the navigateTo
CVE-2026-56697 MEDIUM 6.1 UPGRADE Nuxt versions 4.0.0 before 4.4.7 and 3.x before 3.21.7 accept protocol-relative paths such as //evil.com in th
CVE-2026-56317 MEDIUM 6.1 UPGRADE Nuxt before 4.4.7 (and the 3.x branch before 3.21.7) contains a cross-site scripting vulnerability in the NoSc

References

← Back to latest CVEs