Is CVE-2026-49993 in the CISA KEV catalog?

No. CVE-2026-49993 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2026-49993?

CVE-2026-49993 has a CVSS v3 base score of 5.7 (MEDIUM).

What is the EPSS score for CVE-2026-49993?

CVE-2026-49993 has an EPSS score of 0.28% (20th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2026-49993?

Upgrade nuxt\/rspack-builder to 4.4.7 or later. Fixes are available for 2 affected products.

CVE & CISA-KEV Catalog

CVE-2026-49993

MEDIUM

5.7

CVSS v3

NVD

Description

Nuxt is an open-source web development framework for Vue.js. In @nuxt/rspack-builder and @nuxt/webpack-builder from versions 3.15.4 to before 3.21.7 and 4.0.0 to before 4.4.7, there is an incomplete fix for GHSA-6m52-m754-pw2g. Source code may still 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 3.21.7 and 4.4.7.

CWE-749

How to fix

Remediation Available

nuxt\/rspack-builderNVD

Affected:>= 4.0.0, < 4.4.7Fixed in:4.4.7CVE-2026-49993derived from NVD

nuxt\/webpack-builderNVD

Affected:>= 4.0.0, < 4.4.7Fixed in:4.4.7CVE-2026-49993derived 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 VectorAdjacent

Attack ComplexityLow

Privileges RequiredNone

User InteractionRequired

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityNone

AvailabilityNone

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

Exploit Intelligence

0.28%probability of exploitation in 30 days

20thpercentile

Low risk: more likely to be exploited than 20% of all known CVEs.

References

Patch4

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.