CVE-2026-53721Network attack vector

Authorization bypass via case-mismatched route-rule lookup

Published Jun 12, 2026 · Updated Jun 12, 2026

Incorrect authorization in Nuxt 3.11.0 through 3.21.6 and 4.0.0 through 4.4.6 allows remote attackers to bypass route middleware. The getRouteRules lookup sends the requested path to a case-sensitive rou3 matcher while vue-router matches the page case-insensitively, so appMiddleware is omitted. Exploitation requires routeRules.appMiddleware as an authorization gate with case-insensitive routing and exposes the rendered page and SSR-fetched data, while independent API authorization remains unaffected.

CVSS severity8.8
High
EPSS probability0.40%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Incorrect authorization in Nuxt 3.11.0 through 3.21.6 and 4.0.0 through 4.4.6 allows remote attackers to bypass route middleware. The getRouteRules lookup sends the requested path to a case-sensitive rou3 matcher while vue-router matches the page case-insensitively, so appMiddleware is omitted. Exploitation requires routeRules.appMiddleware as an authorization gate with case-insensitive routing and exposes the rendered page and SSR-fetched data, while independent API authorization remains unaffected.

The record

CVE
CVE-2026-53721
Published
Jun 12, 2026
Updated
Jun 12, 2026
Vendor
Nuxt
Product
Nuxt
Classifications
CWE-863, CWE-178, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 12, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 12, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=>= 3.11.0, < 3.21.7
  2. Affected versionversion=>= 4.0.0, < 4.4.7

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Nuxt · Nuxtversion=>= 3.11.0, < 3.21.7; version=>= 4.0.0, < 4.4.7

Published CVSS scores

8.8GitHubCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N
8.2NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-863Incorrect Authorization
CWE-178Improper Handling of Case Sensitivity
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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