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n8n Vulnerable to XSS via MCP OAuth client

🗓️ 29 Apr 2026 21:23:04Reported by GitHub Advisory DatabaseType 
github
 github
🔗 github.com👁 8 Views

An unauthenticated attacker can register a malicious authorization client; a toast XSS could steal credentials.

Related
Detection
Refs
ReporterTitlePublishedViews
Family
ATTACKERKB
CVE-2026-42235
4 May 202618:38
attackerkb
Circl
CVE-2026-42235
4 May 202621:11
circl
CNNVD
n8n 跨站脚本漏洞
4 May 202600:00
cnnvd
CVE
CVE-2026-42235
4 May 202618:38
cve
Cvelist
CVE-2026-42235 n8n: XSS via MCP OAuth client
4 May 202618:38
cvelist
EUVD
EUVD-2026-27110
4 May 202618:38
euvd
NVD
CVE-2026-42235
4 May 202619:16
nvd
OSV
GHSA-537J-GQPC-P7FQ n8n Vulnerable to XSS via MCP OAuth client
29 Apr 202621:23
osv
Positive Technologies
PT-2026-36905
29 Apr 202600:00
ptsecurity
RedhatCVE
CVE-2026-42235
5 Jun 202619:16
redhatcve
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Vulners
Node
n8nn8nRange2.17.02.17.4npm
OR
n8nn8nRange2.18.02.18.1npm
OR
n8nn8nRange<1.123.32npm

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