CVE-2026-121419

HighCVSS 8.1/10Last modified Nov 9, 2026

Description

SurrealDB from 3.1.0 before 3.3.0 contains an improper authentication vulnerability where the MCP BoundSubject fingerprint uses the access method name instead of per-user identity for JWT/Bearer access. Attackers with a valid low-privilege token for the same access method and a victim's mcp-session-id can hijack the session and execute MCP tools with the victim's roles and permissions.

Metrics

CVSS 3.1 8.1/10CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

Weakness enumeration

CWE-269

Affected software

No affected versions have been published.

Timeline

Published: Nov 3, 2026
Last modified: Nov 9, 2026
NVD status: Deferred

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