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CVE-2026-42236

🗓️ 05 Jun 2026 19:16:52Reported by redhat.comType 
redhatcve
 redhatcve
🔗 access.redhat.com👁 21 Views

CVE-2026-42236: n8n allowed unauthenticated OAuth client registrations, causing memory exhaustion; fixed in affected versions.

Related
Refs
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Family
attackerkb
attackerkb
CVE-2026-42236
4 May 202618:38
–attackerkb
bdu_fstec
BDU FSTEC
N8n MCP Client Registration DoS
18 May 202600:00
–bdu_fstec
circl
Circl
CVE-2026-42236
4 May 202620:56
–circl
cnnvd
CNNVD
n8n security vulnerabilities
4 May 202600:00
–cnnvd
cve
CVE
CVE-2026-42236
4 May 202618:38
–cve
cvelist
Cvelist
CVE-2026-42236 n8n: Unauthenticated Denial of Service via MCP Client Registration
4 May 202618:38
–cvelist
euvd
EUVD
EUVD-2026-27111
4 May 202618:38
–euvd
github
Github Security Blog
n8n Vulnerable to Unauthenticated Denial of Service via MCP Client Registration
29 Apr 202621:19
–github
mend
Mend
CVE-2026-42236
4 May 202618:38
–mend
nvd
NVD
CVE-2026-42236
4 May 202619:16
–nvd
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05 Jun 2026 19:16Current
7High risk
Vulners AI Score7
CVSS 3.17.5
CVSS 48.7
EPSS0.00487
SSVC
21