MEDIUMCVSS v3.1 4.7Vulnerability
CVE-2026-126386
n8n before 1.123.89, 2.x before 2.45.5, 2.46.x before 2.46.1, and 3.x before 3.0.1 contains an open redirect vulnerability in the unauthenticated MCP OAuth dynamic client registration flow, which accepts arbitrary redirect_uri values via the /mcp-oauth/register endpoint. Attackers can send victims crafted /mcp-oauth/authorize URLs that redirect them to attacker-controlled sites before instance checks run, enabling phishing.
Properties
- Severity
- MEDIUM
- Nvd fetched at
- 2026-11-14T00:40:25.638091+00:00
- Epss score
- 0.00275
- Cvss severity
- MEDIUM
- Cvss score
- 4.7
- Retrieved at
- 2026-11-14T00:51:03+00:00
- Last source
- FIRST EPSS
- Score
- 4.7
- Cvss version
- 3.1
- Cve id
- CVE-2026-126386
- Cvss vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:L/A:N
- First seen by Signal
- 2026-11-13T17:31:47+00:00
- Vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:L/A:N
- Published at
- 2026-11-13T10:17:41.843
- Last modified
- 2026-11-13T10:17:41.973
- Epss percentile
- 0.20132
Related Entities (1)
HAS_WEAKNESS (1)
Related research
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