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CVE-2026-45669 nuxt CVE debrief

CVE-2026-45669 is a vulnerability in the Nuxt open-source web development framework for Vue.js. Versions 3.4.3 to before 3.21.6 and 4.0.0-alpha.1 to before 4.4.6 are affected. The navigateTo() function with external: true generates a server-side HTML redirect body containing a <meta http-equiv='refresh'> tag. The destination URL is only sanitized by replacing ' with %22, leaving <, >, &, and ' unencoded. An attacker who can influence the URL passed to navigateTo(url, { external: true }) can break out of the content='…' attribute and inject arbitrary HTML/JavaScript that executes under the application's origin.

Vendor
nuxt
Product
Unknown
CVSS
MEDIUM 5.3
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-12
Original CVE updated
2026-06-15
Advisory published
2026-06-12
Advisory updated
2026-06-15

Who should care

Developers using Nuxt versions 3.4.3 to before 3.21.6 and 4.0.0-alpha.1 to before 4.4.6 should be aware of this vulnerability.

Technical summary

The vulnerability arises from the navigateTo() function in Nuxt, which generates a server-side HTML redirect body with a <meta http-equiv='refresh'> tag. The destination URL is not properly sanitized, allowing an attacker to inject arbitrary HTML/JavaScript.

Defensive priority

MEDIUM

Recommended defensive actions

  • Update to Nuxt version 3.21.6 or later
  • Update to Nuxt version 4.4.6 or later

Evidence notes

CVE-2026-45669 has a CVSS score of 5.3 and is classified as MEDIUM severity.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-45669 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-45669

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-45669 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-45669

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.