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@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)

🗓️ 16 Jun 2026 23:39:16Reported by GitHub Advisory DatabaseType 
github
 github🔗 github.com👁 4 Views

Incomplete fix leaves dev server vulnerable to same-origin data leakage on non-loopback hosts.

Related
Detection
Refs
ReporterTitlePublishedViews
Family
Circl		CVE-2026-49993
2 Jun 202614:32
–circl
CVE		CVE-2026-49993
12 Jun 202612:57
–cve
Cvelist		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)
12 Jun 202612:57
–cvelist
EUVD		EUVD-2026-36421
16 Jun 202623:39
–euvd
NVD		CVE-2026-49993
12 Jun 202614:16
–nvd
OSV		GHSA-X6QJ-4H56-5RJ5 @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)
16 Jun 202623:39
–osv
Positive Technologies		PT-2026-48868
12 Jun 202600:00
–ptsecurity
Snyk		Improper Verification of Source of a Communication Channel
12 Jun 202614:10
–snyk
Snyk		Improper Verification of Source of a Communication Channel
12 Jun 202614:10
–snyk
Vulnrichment		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)
12 Jun 202612:57
–vulnrichment
Rows per page
Vulners
Node
nuxtnuxt/rspack-builderRange3.15.4–3.21.7npm
OR
nuxtnuxt/rspack-builderRange4.0.0–4.4.7npm
OR
nuxtnuxt/webpack-builderRange3.15.4–3.21.7npm
OR
nuxtnuxt/webpack-builderRange4.0.0–4.4.7npm

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16 Jun 2026 23:39Current
5.2Medium risk
Vulners AI Score5.2
CVSS 3.15.7
CVSS 45.9
EPSS0.00201
SSVC
CWE-749
same origin bypassnuxt dev servernon loopback hostsecurity advisory
4