CVE-2026-49993 — Security Box Score

CVE · referencelatest edition

Reference page — cumulative record through Wednesday, August 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2026-49993MEDIUM

nuxt nuxt — @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)

  AV  AC  AT  PR  UI  VC  VI  VA   CVSS    EPSS   %ile   KEV
   A   H   P   N   P   H   N   N    5.9   .0028   20.6     —

AFFECTED
  Product  Versions               Fixed
  nuxt     >= 3.15.4, < 3.21.7 –  —

TIMELINE
  Jun 2   Reserved by GitHub_M
  Jun 12  EXPLOIT PUBLISHED — CVE-2026-49993 (nuxt). Public exploit reference added.
  Jun 12  Published (CNA: GitHub_M)

CWE-749 · CNA: GitHub_M · CVSS v4.0 · 5 references · NVD status: Analyzed

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.

Lifecycle

Complete event history — 3 events, chronological
Date	Event	Detail
June 2, 2026	Reserved	Reserved by GitHub_M
June 12, 2026	EXPLOIT PUBLISHED	EXPLOIT PUBLISHED — CVE-2026-49993 (nuxt). Public exploit reference added.
June 12, 2026	Published	Published (CNA: GitHub_M)

Affected

Affected products and packages — 1 row
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
nuxt	nuxt	—	>= 3.15.4, < 3.21.7	—

Weaknesses

CWE-749

References (5)

https://github.com/nuxt/nuxt/commit/77187ee4015e9267fb464951542a3e09e8b5fa05 [Patch]
https://github.com/nuxt/nuxt/commit/e351de943e82db16970618b60dc7fdbaa58630f3 [Patch]
https://github.com/nuxt/nuxt/pull/35200 [Issue Tracking]
https://github.com/nuxt/nuxt/security/advisories/GHSA-6m52-m754-pw2g [Exploit, Mitigation, Patch, Vendor Advisory]
https://github.com/nuxt/nuxt/security/advisories/GHSA-x6qj-4h56-5rj5 [Exploit, Mitigation, Patch, Vendor Advisory]

Authoritative record: CVE-2026-49993 at cve.org

Vendors: nuxt

Weaknesses: CWE-749

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-49993 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Wednesday, August 19, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.