CVE-2026-63746: SurrealDB Graph Traversal Bypasses Table SELECT Vulnerability

MODERATE
Advisory Identifier: GHSA-vjjx-rfw4-rmfc
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CVSS 6.5
CWE-200 CWE-863
Published
Advisory Summary

CVE-2026-63746 is a MODERATE (CVSS 6.5) graph traversal bypasses table select vulnerability (CWE-200: Exposure of Sensitive Information to an Unauthorized Actor) affecting SurrealDB libraries in the crates.io ecosystem. The issue involves graph traversal bypasses table select permissions. Remediation is available by upgrading affected packages to version 3.1.0.

CVE-2026-63746 at a Glance

CVE Identifier CVE-2026-63746
GHSA Identifier GHSA-vjjx-rfw4-rmfc
Severity MODERATE
CVSS v3.1 Base Score 6.5
CWE Classification CWE-200: Exposure of Sensitive Information to an Unauthorized Actor
Affected Product SurrealDB
Package Ecosystem crates.io
Published Date
Last Updated

Security Impact

CVSS: 6.5

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required Low (PR:L)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality High (C:H)
Integrity None (I:N)
Availability None (A:N)

How to Fix CVE-2026-63746

To remediate this vulnerability, upgrade all affected SurrealDB dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

surrealdb fixed: 3.1.0 
Upgrade surrealdb to 3.1.0
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

inspect dependencies for surrealdb

How to Check if You Are Affected

To determine whether your application is affected by CVE-2026-63746, inspect your project dependencies for SurrealDB:

inspect dependencies for surrealdb

Analyze the terminal output to locate any version of SurrealDB in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 3.1.0), your application is affected.

Note: Verify declared build manifests and deployed runtime container environments.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-200: Exposure of Sensitive Information to an Unauthorized Actor, where the product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. In SurrealDB, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

An 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. Traversing `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. The 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. ### Impact An 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. ### Patches A 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. - Versions 3.1.0 and later are not affected. ### Workarounds - Remove `select` permission on edge tables whose targets should be hidden. - Use namespace or database isolation as the primary boundary where feasible.

CVE-2026-63746 Affected SurrealDB Versions

1 component(s)
Fixed Versions:
3.1.0
Product / Package Ecosystem Affected Versions Fixed Version
surrealdb
 crates.io
< 3.1.0
3.1.0

References

GitHub Advisory / Wiki ADVISORY
https://github.com/surrealdb/surrealdb/security/advisories/GHSA-vjjx-rfw4-rmfc
NVD — CVE-2026-63746 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-63746
SurrealDB Source Repository REPOSITORY
https://github.com/surrealdb/surrealdb
www.vulncheck.com/advisories/surreald... WEB
https://www.vulncheck.com/advisories/surrealdb-before-permission-bypass-via-graph-traversal

Frequently Asked Questions

What is CVE-2026-63746?
CVE-2026-63746 is a security vulnerability in SurrealDB involving Graph traversal bypasses table SELECT permissions under CWE-200: Exposure of Sensitive Information to an Unauthorized Actor.
Which SurrealDB versions are affected?
Affected versions include releases prior to 3.1.0 across affected packages: surrealdb.
What version fixes CVE-2026-63746?
Upgrading to 3.1.0 (or the latest patched release for your respective branch) resolves the vulnerability.
Is surrealdb affected?
Yes, surrealdb is affected in releases prior to 3.1.0. Upgrade your dependency to 3.1.0 or later.
What is the CVSS score of CVE-2026-63746?
CVE-2026-63746 has a CVSS v3.1 base score of 6.5 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.
What CWE is associated with CVE-2026-63746?
CVE-2026-63746 is classified under CWE-200: Exposure of Sensitive Information to an Unauthorized Actor (The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information.).
How can I check crates.io dependencies for CVE-2026-63746?
Run the dependency tree command: 'inspect dependencies for surrealdb'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-vjjx-rfw4-rmfc",
  "modified" : "2026-09-04T20:12:55Z",
  "published" : "2026-07-01T20:10:34Z",
  "aliases" : [ "CVE-2026-63746" ],
  "summary" : "SurrealDB: Graph traversal bypasses table SELECT permissions",
  "details" : "An 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.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "crates.io",
      "name" : "surrealdb"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "3.1.0"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/surrealdb/surrealdb/security/advisories/GHSA-vjjx-rfw4-rmfc"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-63746"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/surrealdb/surrealdb"
  }, {
    "type" : "WEB",
    "url" : "https://www.vulncheck.com/advisories/surrealdb-before-permission-bypass-via-graph-traversal"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-200", "CWE-863" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-07-01T20:10:34Z",
    "nvd_published_at" : null
  }
}