{"id":"CVE-2026-121419","published":"2026-11-03T15:17:31.953","lastModified":"2026-11-03T15:17:32.103","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.","cvssScore":8.1,"cvssSeverity":"HIGH","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N","cwes":["CWE-269"],"vendors":[],"products":[],"references":[{"url":"https://github.com/surrealdb/surrealdb/security/advisories/GHSA-pgh9-49q4-hqcx","tags":[]},{"url":"https://www.vulncheck.com/advisories/surrealdb-3.1.0-before-3.3.0-mcp-session-hijack-via-boundsubject-collision","tags":[]}],"exploitRefs":[{"url":"https://github.com/surrealdb/surrealdb/security/advisories/GHSA-pgh9-49q4-hqcx","tags":[]}],"hasPoc":true,"ai":null}