vulntracker.iovulntracker.io
© 2026 vulntracker.io

CVE-2026-49993

@nuxt/webpack-builder and @nuxt/rspack-builder dev server same-origin check bypassed when Sec-Fetch-Site, Origin, and Referer are all absent (incomplete fix for GHSA-6m52-m754-pw2g)

MEDIUM
5.7
CVSS Score
Published: June 12, 2026 at 12:57 PM UTC
Updated: June 17, 2026 at 10:55 AM UTC
3 products affected across 1 vendorNuxt /rspack BuilderNuxt /webpack BuilderNuxt

Using nuxt by nuxt?

Get instant alerts when new vulnerabilities affect nuxt - before attackers find them.

Real-time alertsTrack your software stackFree plan available
Start FreeSign In
Severity
MEDIUM5.7
Exploit prediction
EPSS 0.3%
SSVC
PoC

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Nuxt /rspack Builder· Nuxt
95%
3.15.4 ≤ v < 3.21.74.0.0 ≤ v < 4.4.7
Affected range stops below 3.21.7, so it looks safe — our inference, not a vendor statement
Affected range stops below 4.4.7, so it looks safe — our inference, not a vendor statement
Nuxt /webpack Builder· Nuxt
95%
3.15.4 ≤ v < 3.21.74.0.0 ≤ v < 4.4.7
Affected range stops below 3.21.7, so it looks safe — our inference, not a vendor statement
Affected range stops below 4.4.7, so it looks safe — our inference, not a vendor statement
Nuxt· Nuxt
60%
v < 3.21.7v < 4.4.7
Affected range stops below 3.21.7, so it looks safe — our inference, not a vendor statement
Affected range stops below 4.4.7, so it looks safe — our inference, not a vendor statement

References (5)

x_refsource_CONFIRMExploitMitigationPatchVendor Advisory
Source: cverecord
https://github.com/nuxt/nuxt/security/advisories/GHSA-x6qj-4h56-5rj5
x_refsource_MISCExploitMitigationPatchVendor Advisory
Source: cverecord
https://github.com/nuxt/nuxt/security/advisories/GHSA-6m52-m754-pw2g
x_refsource_MISCIssue Tracking
Source: cverecord
https://github.com/nuxt/nuxt/pull/35200
x_refsource_MISCPatch
Source: cverecord
https://github.com/nuxt/nuxt/commit/77187ee4015e9267fb464951542a3e09e8b5fa05
x_refsource_MISCPatch
Source: cverecord
https://github.com/nuxt/nuxt/commit/e351de943e82db16970618b60dc7fdbaa58630f3

SSVC — Action Prioritization

SSVCPoCNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

5.7MEDIUM[email protected]
Attack Vector
ADJACENT_NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
NONE
Availability
NONE
Vector?

Quick Info

StatusANALYZED
CWE
CWE-749

Get alerted

Stop reading CVE feeds looking for your own stack

Track the products you run and VulnTracker tells you when a new CVE affects them — with what is known about fixing it, and nothing about the rest.

Create accountSign in
Free plan, no card