{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-121419","assignerOrgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","state":"PUBLISHED","assignerShortName":"VulnCheck","dateReserved":"2026-11-03T12:29:41.359Z","datePublished":"2026-11-03T14:28:16.612Z","dateUpdated":"2026-11-03T14:28:16.612Z"},"containers":{"cna":{"providerMetadata":{"orgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","shortName":"VulnCheck","dateUpdated":"2026-11-03T14:28:16.612Z"},"datePublic":"2026-10-19T00:00:00.000Z","title":"SurrealDB 3.1.0 before 3.3.0 MCP Session Hijack via BoundSubject Collision","descriptions":[{"lang":"en","value":"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."}],"problemTypes":[{"descriptions":[{"lang":"en","description":"Improper Privilege Management","cweId":"CWE-269","type":"CWE"}]}],"affected":[{"vendor":"surrealdb","product":"surrealdb","defaultStatus":"unaffected","packageURL":"pkg:cargo/surrealdb","versions":[{"version":"3.1.0","status":"affected","versionType":"semver","lessThan":"3.3.0"},{"version":"3.3.0","status":"unaffected","versionType":"semver"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:surrealdb:surrealdb:*:*:*:*:*:*:*:*","versionStartIncluding":"3.1.0","versionEndExcluding":"3.3.0"}]}]}],"metrics":[{"format":"CVSS","cvssV4_0":{"version":"4.0","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N","attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"LOW","userInteraction":"NONE","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"HIGH","vulnAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","baseScore":8.6,"baseSeverity":"HIGH"}},{"format":"CVSS","cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"NONE","baseScore":8.1,"baseSeverity":"HIGH"}}],"references":[{"url":"https://github.com/surrealdb/surrealdb/security/advisories/GHSA-pgh9-49q4-hqcx","tags":["vendor-advisory"],"name":"GitHub Security Advisory (GHSA-pgh9-49q4-hqcx)"},{"name":"VulnCheck Advisory: SurrealDB 3.1.0 before 3.3.0 MCP Session Hijack via BoundSubject Collision","tags":["third-party-advisory"],"url":"https://www.vulncheck.com/advisories/surrealdb-3.1.0-before-3.3.0-mcp-session-hijack-via-boundsubject-collision"}],"credits":[{"lang":"en","value":"Yanhaoxi","type":"reporter"}],"x_generator":{"engine":"vulncheck-endgame"}}}}