HIGH 8.6 NVD
CVE-2026-121419
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 o
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.
References
- https://github.com/surrealdb/surrealdb/security/advisories/GHSA-pgh9-49q4-hqcx
- https://www.vulncheck.com/advisories/surrealdb-3.1.0-before-3.3.0-mcp-session-hijack-via-b
This high severity vulnerability with a CVSS score of 8.6 was published on 2026-11-03 via NVD.
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