Is CVE-2026-121419 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-121419?

CVE-2026-121419 has a CVSS v3 severity of HIGH (8.1).

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CVE-2026-121419

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.