Is CVE-2026-45670 in the CISA KEV catalog?

No. CVE-2026-45670 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2026-45670?

CVE-2026-45670 has a CVSS v3 base score of 5.4 (MEDIUM).

What is the EPSS score for CVE-2026-45670?

CVE-2026-45670 has an EPSS score of 0.21% (11th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2026-45670?

Upgrade nuxt\/rspack-builder to 4.4.5 or later. Fixes are available for 2 affected products.

CVE & CISA-KEV Catalog

CVE-2026-45670

MEDIUM

5.4

CVSS v3

NVD

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.

CWE-749

How to fix

Remediation Available

nuxt\/rspack-builderNVD

Affected:>= 4.0.0, < 4.4.5Fixed in:4.4.5CVE-2026-45670derived from NVD

nuxt\/webpack-builderNVD

Affected:>= 4.0.0, < 4.4.5Fixed in:4.4.5CVE-2026-45670derived from NVD

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionRequired

ScopeUnchanged

Impact

ConfidentialityLow

IntegrityLow

AvailabilityNone

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

Exploit Intelligence

0.21%probability of exploitation in 30 days

11thpercentile

Low risk: more likely to be exploited than 11% of all known CVEs.

References

Exploit2

Issue Tracking1

github.com

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-06-15.