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CVE-2026-42235

🗓️ 04 May 2026 18:38:09Reported by GitHub_MType 
cve
 cve
🔗 web.nvd.nist.gov👁 70 Views

Unauthenticated attackers can register an MCP OAuth client to trigger XSS and steal credentials.

Related
Detection
Affected
Refs
ReporterTitlePublishedViews
Family
attackerkb
attackerkb
CVE-2026-42235
4 May 202618:38
–attackerkb
bdu_fstec
BDU FSTEC
N8n MCP OAuth XSS
15 May 202600:00
–bdu_fstec
circl
Circl
CVE-2026-42235
4 May 202621:11
–circl
cnnvd
CNNVD
n8n Cross-site Scripting Vulnerabilities
4 May 202600:00
–cnnvd
cvelist
Cvelist
CVE-2026-42235 n8n: XSS via MCP OAuth client
4 May 202618:38
–cvelist
euvd
EUVD
EUVD-2026-27110
4 May 202618:38
–euvd
github
Github Security Blog
n8n Vulnerable to XSS via MCP OAuth client
29 Apr 202621:23
–github
mend
Mend
CVE-2026-42235
4 May 202618:38
–mend
nvd
NVD
CVE-2026-42235
4 May 202619:16
–nvd
osv_ghsa
osv_ghsa
GHSA-537J-GQPC-P7FQ n8n Vulnerable to XSS via MCP OAuth client
29 Apr 202621:23
–osv_ghsa
Rows per page
NVD
Vulners
Node
OR
n8nn8nRange<1.123.32enterprisenode.js
n8nn8nRange2.17.0–2.17.4enterprisenode.js
n8nn8nMatch2.18.0enterprisenode.js
[
  {
    "vendor": "n8n-io",
    "product": "n8n",
    "versions": [
      {
        "version": "< 1.123.32",
        "status": "affected"
      },
      {
        "version": ">= 2.17.0, < 2.17.4",
        "status": "affected"
      },
      {
        "version": ">= 2.18.0, < 2.18.1",
        "status": "affected"
      }
    ]
  }
]

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17 Jun 2026 10:47Current
8.4High risk
Vulners AI Score8.4
CVSS 3.19.6
CVSS 48.8
EPSS0.00505
SSVC
70