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GHSA-537J-GQPC-P7FQ n8n Vulnerable to XSS via MCP OAuth client

🗓️ 29 Apr 2026 21:23:04Reported by GoogleType 
osv_ghsa
 osv_ghsa
🔗 osv.dev👁 65 Views

Unauthenticated cross-site scripting in n8n via an authorization client; crafted client_name enables script in a toast after consent and revoke.

Related
Refs
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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
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cnnvd
CNNVD
n8n 跨站脚本漏洞
4 May 202600:00
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cve
CVE
CVE-2026-42235
4 May 202618:38
–cve
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
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nvd
NVD
CVE-2026-42235
4 May 202619:16
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