CVE-2026-121419
Published:November 03, 2026
Updated:November 04, 2026
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.
Affected Packages
https://github.com/surrealdb/surrealdb.git (GITHUB):
Affected version(s) >=v3.1.0-beta.1 <v3.3.0 || >=v3.3.0-beta.1 <v3.3.0Fix Suggestion:
Update to version v3.3.0surrealdb (RUST):
Affected version(s) >=3.1.0-beta.1 <3.3.0 || >=3.3.0-beta.1 <3.3.0Fix Suggestion:
Update to version 3.3.0surrealdb-mcp (RUST):
Affected version(s) >=3.1.0-beta.1 <3.3.0 || >=3.3.0-beta.1 <3.3.0Fix Suggestion:
Update to version 3.3.0surrealdb-core (RUST):
Affected version(s) >=3.1.0-beta.1 <3.3.0 || >=3.3.0-beta.1 <3.3.0Fix Suggestion:
Update to version 3.3.0Related Resources (4)
Do you need more information?
Contact UsCVSS v4
Base Score:
8.6
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
LOW
User Interaction
NONE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
HIGH
Vulnerable System Availability
NONE
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
8.1
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
NONE
Weakness Type (CWE)
Improper Privilege Management
EPSS
Base Score:
0.32