CVE-2026-45670

Name: CVE-2026-45670
Creator: NVD / NIST
Published: 2026-06-12T14:16:31.443+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.9/10EPSS 0.21%

Last modified Jun 17, 2026

CVE-2026-45670 is a medium-severity vulnerability rated 5.9/10 on the CVSS scale. Nuxt is an open-source web development framework for Vue.js. In @nuxt/rspack-builder and @nuxt/webpack-builder versions 3.15.4 to before 3.21.6, and 4.0.0-alpha.1 to before 4.4.6, there is an incomplete fix for GHSA-4gf7-ff8x-hq99. EPSS estimates a 0.21% chance of exploitation in the next 30 days.

Description

Nuxt is an open-source web development framework for Vue.js. In @nuxt/rspack-builder and @nuxt/webpack-builder versions 3.15.4 to before 3.21.6, and 4.0.0-alpha.1 to before 4.4.6, there is an incomplete fix for GHSA-4gf7-ff8x-hq99. Source code may be stolen during dev when using the webpack / rspack builder if the dev server is bound to a non-loopback address (e.g. nuxt dev --host) and the developer opens a malicious site on the same network. This issue has been patched in versions 3.21.6 and 4.4.6.

Metrics

CVSS 3.1

5.4/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N

CVSS 4.0

5.9/10

CVSS:4.0/AV:A/AC:H/AT:P/PR:N/UI:P/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS Probability

0.21%

10.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-749

Affected Software

Vendor	Product	Versions
Nuxt	Nuxt\/Rspack-Builder	>= 3.12.2, < 3.21.5
Nuxt	Nuxt\/Rspack-Builder	>= 4.0.0, < 4.4.5
Nuxt	Nuxt\/Webpack-Builder	>= 3.0.0, < 3.21.5
Nuxt	Nuxt\/Webpack-Builder	>= 4.0.0, < 4.4.5

References

https://github.com/nuxt/nuxt/pull/35051Issue Tracking
https://github.com/nuxt/nuxt/security/advisories/GHSA-4gf7-ff8x-hq99Exploit, Vendor Advisory
https://github.com/nuxt/nuxt/security/advisories/GHSA-6m52-m754-pw2gExploit, Vendor Advisory
https://github.com/nuxt/nuxt/security/advisories/GHSA-4gf7-ff8x-hq99Exploit, Vendor Advisory
https://github.com/nuxt/nuxt/security/advisories/GHSA-6m52-m754-pw2gExploit, Vendor Advisory

Timeline

Published: Jun 12, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-45670?

How severe is CVE-2026-45670?

CVE-2026-45670 has a CVSS score of 5.9/10 (MEDIUM severity). The EPSS model estimates a 0.21% probability of exploitation in the next 30 days.

How do I fix CVE-2026-45670?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-45670?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST