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bdu:2026-06872

2026-10-03T14:02:53.084916+00:00

bdu:2026-06872

EUVD-2026-308582

2026-10-03T14:02:53.084955+00:00

EUVD-2026-308582

fkie_cve-2026-42235

2026-10-03T14:02:53.084970+00:00

n8n is an open source workflow automation platform. Prior to versions 1.123.32, 2.17.4, and 2.18.1, an unauthenticated attacker could register a malicious MCP OAuth client with a crafted client_name. If a victim user authorized the OAuth consent dialog and a second user subsequently revoked that access, a toast notification would render the injected script. Clicking the link would execute arbitrary JavaScript in the victim's authenticated n8n browser session, enabling credential and session token theft, workflow manipulation, or privilege escalation. This issue has been patched in versions 1.123.32, 2.17.4, and 2.18.1.

GHSA-537j-gqpc-p7fq — n8n Vulnerable to XSS via MCP OAuth client

2026-10-03T14:02:53.085005+00:00

Affected: npm: n8n

## Impact An unauthenticated attacker could register a malicious MCP OAuth client with a crafted `client_name`. If a victim user authorized the OAuth consent dialog and a second user subsequently revoked that access, a toast notification would render the injected script. Clicking the link would execute arbitrary JavaScript in the victim's authenticated n8n browser session, enabling credential and session token theft, workflow manipulation, or privilege escalation.

## Patches This issue has been fixed in n8n version 2.14.2. Users should upgrade to this version or later to remediate the vulnerability.

## Workarounds If upgrading is not immediately possible, administrators should consider the following temporary mitigations: - Restrict access to the n8n instance and the MCP OAuth registration endpoint to trusted users only. - Disable MCP server functionality if it is not actively required.

These workarounds do not fully remediate the risk and should only be used as short-term mitigation measures.

WID-SEC-W-2026-1251 — n8n: Mehrere Schwachstellen

2026-10-03T14:02:53.085039+00:00

Ein Angreifer kann mehrere Schwachstellen in n8n ausnutzen, um beliebigen Programmcode auszuführen, Sicherheitsmaßnahmen zu umgehen, vertrauliche Informationen offenzulegen, SQL-Injection-Angriffe durchzuführen, einen Denial-of-Service-Zustand verursachen, Cross-Site-Scripting-Angriffe durchzuführen, Benutzer auf bösartige Websites umzuleiten oder Sitzungen zu kapern.