CVE-2026-121419

    Dashboard / Vulnerabilities / CVE-2026-121419

    CVE-2026-121419

    Published: 3 Nov 2026Last Modified: 5 Nov 2026

    Summary: SurrealDB 3.1.0 before 3.3.0 MCP Session Hijack via BoundSubject Collision

    Details: 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/CVEProject/cvelistV5/tree/main/cves/2026/121xxx/CVE-2026-121419.json, https://github.com/surrealdb/surrealdb/security/advisories/GHSA-pgh9-49q4-hqcx, https://nvd.nist.gov/vuln/detail/CVE-2026-121419, https://www.vulncheck.com/advisories/surrealdb-3.1.0-before-3.3.0-mcp-session-hijack-via-boundsubject-collision

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0009e5b058aff977c3ee6d695073be1433924903
    Fixed -238bfeb11f5725bebed370167656748df8067595

    Affected versions

    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
    CVE-2026-121419 | CVE-DB