{"id":"CVE-2026-63746","aliases":["GHSA-vjjx-rfw4-rmfc"],"title":"SurrealDB: Graph traversal bypasses table SELECT permissions","summary":"SurrealDB: Graph traversal bypasses table SELECT permissions","severity":"medium","cvss":6.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","vendor":"surrealdb","product":"surrealdb","ecosystem":"rust","affected":["surrealdb < 3.1.0"],"patched":["surrealdb 3.1.0"],"published":"2026-07-01","updated":"2026-09-04","source":"OSV","sourceUrl":"https://osv.dev/vulnerability/GHSA-vjjx-rfw4-rmfc","references":[{"url":"https://github.com/surrealdb/surrealdb/security/advisories/GHSA-vjjx-rfw4-rmfc"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-63746"},{"url":"https://github.com/surrealdb/surrealdb"},{"url":"https://www.vulncheck.com/advisories/surrealdb-before-permission-bypass-via-graph-traversal"}],"tags":["osv","rust"],"epss":0.00399,"epssPercentile":0.33942,"ingestedAt":"2026-09-05T19:33:50.550Z","slug":"CVE-2026-63746","body":"## Overview\n\nAn authenticated record or scope user could read records on any table reachable through a graph edge or `REFERENCES TO` back-reference, regardless of that table's `PERMISSIONS FOR select` clause.\n\nTraversing `SELECT * FROM source->edge->target` returned full documents from `target` even when `target` was defined as `PERMISSIONS FOR select NONE`. The same bypass extended through multi-hop chains, so any table reachable by a sequence of edges from a readable starting point was exposed.\n\nThe root cause: `GraphEdgeScan` and `ReferenceScan` fetched records straight from storage without routing them through `Document::pluck_select`, so the target table's permission expression was never consulted.\n\n### Impact\n\nAn authenticated record or scope user can read records on any table reachable through a chain of graph edges or back-references from a table they have `select` on, regardless of the target's `PERMISSIONS FOR select` clause. Confidentiality-only and bounded to the caller's current database — namespace and database isolation are unaffected.\n\n### Patches\n\nA new per-batch permission cache (`exec::permission::CachedTableSelect`) resolves each target table's `SELECT` permission once and filters yielded values through `check_permission_for_value`, matching the regular `SELECT` code path.\n\n- Versions 3.1.0 and later are not affected.\n\n### Workarounds\n\n- Remove `select` permission on edge tables whose targets should be hidden.\n- Use namespace or database isolation as the primary boundary where feasible.\n\n## Affected packages\n\n- `surrealdb < 3.1.0`\n\n## Remediation\n\nUpgrade to a patched release:\n\n- `surrealdb 3.1.0`","depth":"sunlit","depthScore":36,"depthScoreParts":{"impact":35.8,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}