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    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 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.

    Published:Nov 3, 2026
    Last Modified:Nov 3, 2026
    EPS:Nov 3, 2026
    EPSS Score:
    CVSS Score:8.1

    Affected Products

    Vendor
    Surrealdb
    Product
    Surrealdb

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-269 Improper Privilege Management

    Related CVEs

    CVE-2026-121423 (CVSS 7.1) — SurrealDB before 3.3.0 contains an unbounded recursion vulnerability that allows authenticated users to abort …
    CVE-2026-121422 (CVSS 5.1) — SurrealDB from 3.1.0 before 3.3.0 contains a server-side request forgery vulnerability that allows database Ow…
    CVE-2026-121421 (CVSS 5.3) — SurrealDB 3.1.0 before 3.3.0 contains a server-side request forgery vulnerability in network-capability matchi…
    CVE-2026-121420 (CVSS 4.8) — SurrealDB from 3.2.0 before 3.3.0 contains a server-side request forgery vulnerability in the FilteringResolve…
    CVE-2026-121418 (CVSS 5.3) — SurrealDB from 3.1.0 before 3.3.0 contains an incorrect authorization vulnerability that allows record users t…
    CVE-2026-121417 (CVSS 8.8) — SurrealDB before 3.3.0 contains a use-after-free vulnerability in surrealdb-core KV backends that pass borrowe…
    CVE-2026-121416 (CVSS 7.1) — SurrealDB 2.0.0 before 3.3.1 does not enforce --deny-funcs restrictions on method-style function calls in the …
    CVE-2026-109343 (CVSS 8.6) — SurrealDB before 3.3.0 allows cross-tenant access because the SurrealQL USE statement switches a session to an…
    CVE-2026-109342 (CVSS 5.3) — SurrealDB from 3.0.0 before 3.3.0 contains a missing authentication vulnerability in the revoke RPC method tha…
    CVE-2026-109341 (CVSS 7.1) — SurrealDB before 3.3.0 contains an authorization bypass vulnerability that allows callers with table-level wri…

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High