HIGHCVSS v3.1 8.1Vulnerability
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.
Properties
- Severity
- HIGH
- Nvd fetched at
- 2026-11-03T17:20:13.885968+00:00
- Cvss severity
- HIGH
- Cvss score
- 8.1
- Retrieved at
- 2026-11-03T17:21:18+00:00
- Score
- 8.1
- Cvss version
- 3.1
- Last source
- NVD
- Cve id
- CVE-2026-121419
- Cvss vector
- CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
- First seen by Signal
- 2026-11-03T17:21:18+00:00
- Vector
- CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
- Published at
- 2026-11-03T15:17:31.953
- Last modified
- 2026-11-03T15:17:32.103
Related Entities (1)
HAS_WEAKNESS (1)
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