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CVE-2026-27978

🗓️ 17 Mar 2026 23:59:22Reported by GitHub_MType 
cve
 cve
🔗 web.nvd.nist.gov👁 89 Views🌐 WEB

Fixes CSRF bypass for Server Actions when origin is null by treating it as a value and enforcing checks.

Related
Detection
Affected
Refs
Paths
ReporterTitlePublishedViews
Family
attackerkb
attackerkb
CVE-2026-27978
17 Mar 202623:59
–attackerkb
bdu_fstec
BDU FSTEC
Next.js CSRF
13 May 202600:00
–bdu_fstec
cnnvd
CNNVD
Next.js security vulnerabilities
17 Mar 202600:00
–cnnvd
cvelist
Cvelist
CVE-2026-27978 Next.js: null origin can bypass Server Actions CSRF checks
17 Mar 202623:59
–cvelist
euvd
EUVD
EUVD-2026-12684
17 Mar 202615:30
–euvd
githubexploit
GithubExploit
nextjs-sa-dos-poc-20260413
12 Apr 202622:57
–githubexploit
github
Github Security Blog
Next.js: null origin can bypass Server Actions CSRF checks
17 Mar 202615:30
–github
kitploit
Kitploit
Next.js-Proof-of-Concept
24 Oct 202618:45
–kitploit
mend
Mend
CVE-2026-27978
17 Mar 202623:59
–mend
nessus
Tenable Nessus
Next.js Framework 16.0.1 < 16.1.7 Multiple Vulnerabilities
20 Mar 202600:00
–nessus
Rows per page
NVD
Vulners
Node
vercelnext.jsRange16.0.1–16.1.7node.js
[
  {
    "vendor": "vercel",
    "product": "next.js",
    "versions": [
      {
        "version": ">= 16.0.1, < 16.1.7",
        "status": "affected"
      }
    ]
  }
]
ParameterPositionPathDescriptionCWE
Originheader/Unhandled TypeError in Server Actions CSRF validation when the Origin header contains malformed URLs (e.g., 'http://', 'ftp://') or 'null', leading to an unauthenticated HTTP 500 DoS.CWE-352

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17 Jun 2026 10:28Current
5.4Medium risk
Vulners AI Score5.4
CVSS 3.14.3
CVSS 45.3
EPSS0.00235
SSVC
89