CVE-2026-121419
SurrealDB 3.1.0 before 3.3.0 MCP Session Hijack via BoundSubject Collision
CVSS Score
8.1
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-269 |
| Vendor | surrealdb |
| Product | surrealdb |
| Published | Nov 3, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
None
Affected Versions
surrealdb / surrealdb
3.1.0 < 3.3.0
References
Credits
🔍 Yanhaoxi