Vulnerability-Lookup

CVE-2026-63740 (GCVE-0-2026-63740)

Vulnerability from cvelistv5 – Published: 2026-07-20 12:04 – Updated: 2026-07-28 01:05

Title

SurrealDB before 3.1.4 Array Element Permission Bypass

Summary

SurrealDB versions before 3.1.4 fail to properly enforce SELECT permissions on array elements (field.*) for record users, leaking denied array elements instead of hiding them. Attackers with record scope access can read array elements that element-level permissions should deny by exploiting incorrect index handling during permission filtering.

Severity

7.1 (High)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

6.5 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-07-20 19:23 UTC

CWE

CWE-863 - Incorrect Authorization

Assigner

VulnCheck mitre root

References

2 references

URL	Tags
https://github.com/surrealdb/surrealdb/security/a…	vendor-advisory
https://www.vulncheck.com/advisories/surrealdb-be…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version	CPE status
surrealdb	surrealdb	Affected: 0 , < 3.1.4 (semver) Unaffected: 3.1.4 (semver) cpe:2.3:a:surrealdb:surrealdb::::::::

Date Public

2026-06-10 00:00

Credits

msanchezdev

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-63740

Vulnerability from fkie_nvd - Published: 2026-07-20 12:19 - Updated: 2026-07-22 15:48

Severity

6.5 (Medium) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Summary

References

	URL	Tags
	disclosure@vulncheck.com	https://github.com/surrealdb/surrealdb/security/advisories/GHSA-8rw6-p7m8-63jp	Vendor Advisory, Mitigation
	disclosure@vulncheck.com	https://www.vulncheck.com/advisories/surrealdb-before-array-element-permission-bypass	Third Party Advisory

Impacted products

	Vendor	Product	Version
	surrealdb	surrealdb	*

JSON

To clipboard

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          "userInteraction": "NONE",
          "valueDensity": "NOT_DEFINED",
          "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
          "version": "4.0",
          "vulnAvailabilityImpact": "NONE",
          "vulnConfidentialityImpact": "HIGH",
          "vulnIntegrityImpact": "NONE",
          "vulnerabilityResponseEffort": "NOT_DEFINED"
        },
        "source": "disclosure@vulncheck.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-63740",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-07-20T19:23:31.501013Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-07-20T12:19:43.287",
  "references": [
    {
      "source": "disclosure@vulncheck.com",
      "tags": [
        "Vendor Advisory",
        "Mitigation"
      ],
      "url": "https://github.com/surrealdb/surrealdb/security/advisories/GHSA-8rw6-p7m8-63jp"
    },
    {
      "source": "disclosure@vulncheck.com",
      "tags": [
        "Third Party Advisory"
      ],
      "url": "https://www.vulncheck.com/advisories/surrealdb-before-array-element-permission-bypass"
    }
  ],
  "sourceIdentifier": "disclosure@vulncheck.com",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-863"
        }
      ],
      "source": "disclosure@vulncheck.com",
      "type": "Secondary"
    }
  ]
}

GHSA-8RW6-P7M8-63JP

Vulnerability from github – Published: 2026-08-14 19:40 – Updated: 2026-09-04 19:48

Summary

SurrealDB: Array element-level (field.*) SELECT permissions leak denied elements to record users

Details

A SELECT permission defined on an array element (DEFINE FIELD field.* … PERMISSIONS FOR select …) is not enforced correctly for RECORD users. Instead of hiding the denied elements, the query leaks a subset of them: a deny-all returns the odd-indexed elements, and a per-element predicate keeps and drops the wrong ones.

The filter removed each denied element by index while walking the array forwards. Because removing an element shifts every later index down, each cut invalidated the indices still pending in the loop, leaving denied elements behind. Field-level permissions are enforced correctly; only the element (field.*) level is affected, and only for record users — root and record-owner sessions are not.

Impact

What an attacker can do:

As a record (scope) user, read array elements that an element-level (field.*) SELECT permission should hide, on any table they can already SELECT.
Recover denied elements through both a deny-all and a WHERE predicate — the wrong elements are selected either way.

What it can't do:

Bypass field-level SELECT permissions, which are evaluated correctly.
Affect root or record-owner sessions, or cross namespace/database isolation.
Modify data, escalate privileges, or affect availability (confidentiality only).

Patches

The three permission-filtering paths (doc/reduce.rs, doc/output.rs, exec/operators/scan/pipeline.rs) now remove denied elements in reverse index order, so removing one element no longer shifts the elements still to be checked. Regression tests reproducing the issue were added.

The fix is included in SurrealDB 3.1.4.

Workarounds

Do not rely on element-level (field.*) permissions to hide data from record users; use field-level permissions, which are enforced correctly.
Restrict record users from selecting tables whose schema uses element-level permissions.

Resources

DEFINE FIELD
USERS
DEFINE TABLE … PERMISSIONS
fix(sec): stop array element-level SELECT permissions leaking elements (commit 8f89b260b)

Severity

6.5 (Medium)


                  
                    CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 3.1.3"
      },
      "package": {
        "ecosystem": "crates.io",
        "name": "surrealdb"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.1.4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-63740"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-863"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-08-14T19:40:48Z",
    "nvd_published_at": null,
    "severity": "MODERATE"
  },
  "details": "A `SELECT` permission defined on an array element (`DEFINE FIELD field.* \u2026 PERMISSIONS FOR select \u2026`) is not enforced correctly for `RECORD` users. Instead of hiding the denied elements, the query leaks a subset of them: a deny-all returns the odd-indexed elements, and a per-element predicate keeps and drops the wrong ones.\n\nThe filter removed each denied element by index while walking the array forwards. Because removing an element shifts every later index down, each cut invalidated the indices still pending in the loop, leaving denied elements behind. Field-level permissions are enforced correctly; only the element (`field.*`) level is affected, and only for record users \u2014 root and record-owner sessions are not.\n\n## Impact\n\nWhat an attacker **can** do:\n\n- As a record (scope) user, read array elements that an element-level (`field.*`) SELECT permission should hide, on any table they can already SELECT.\n- Recover denied elements through both a deny-all and a `WHERE` predicate \u2014 the wrong elements are selected either way.\n\nWhat it **can\u0027t** do:\n\n- Bypass field-level SELECT permissions, which are evaluated correctly.\n- Affect root or record-owner sessions, or cross namespace/database isolation.\n- Modify data, escalate privileges, or affect availability (confidentiality only).\n\n## Patches\n\nThe three permission-filtering paths (`doc/reduce.rs`, `doc/output.rs`, `exec/operators/scan/pipeline.rs`) now remove denied elements in reverse index order, so removing one element no longer shifts the elements still to be checked. Regression tests reproducing the issue were added.\n\nThe fix is included in SurrealDB 3.1.4.\n\n## Workarounds\n\n- Do not rely on element-level (`field.*`) permissions to hide data from record users; use field-level permissions, which are enforced correctly.\n- Restrict record users from selecting tables whose schema uses element-level permissions.\n\n## Resources\n\n- [DEFINE FIELD](https://surrealdb.com/docs/surrealql/statements/define/field)\n- [USERS](https://surrealdb.com/docs/learn/security/authentication/authentication)\n- [DEFINE TABLE \u2026 PERMISSIONS](https://surrealdb.com/docs/surrealql/statements/define/table)\n- `fix(sec): stop array element-level SELECT permissions leaking elements` (commit `8f89b260b`)",
  "id": "GHSA-8rw6-p7m8-63jp",
  "modified": "2026-09-04T19:48:51Z",
  "published": "2026-08-14T19:40:48Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/surrealdb/surrealdb/security/advisories/GHSA-8rw6-p7m8-63jp"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-63740"
    },
    {
      "type": "WEB",
      "url": "https://github.com/surrealdb/surrealdb/commit/8f89b260bb9692e5b0d58930793d482a8207eedc"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/surrealdb/surrealdb"
    },
    {
      "type": "WEB",
      "url": "https://www.vulncheck.com/advisories/surrealdb-before-array-element-permission-bypass"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "SurrealDB: Array element-level (field.*) SELECT permissions leak denied elements to record users"
}

GHSA-J6MJ-V752-PP4X

Vulnerability from github – Published: 2026-07-20 12:33 – Updated: 2026-09-04 19:48

Withdrawn 2026-09-04

Summary

Duplicate Advisory: SurrealDB: Array element-level (field.*) SELECT permissions leak denied elements to record users

Details

Duplicate Advisory

This advisory has been withdrawn because it is a duplicate of GHSA-8rw6-p7m8-63jp. This link is maintained to preserve external references.

Original Description

Severity

6.5 (Medium)


                  
                    CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

7.1 (High)


                  
                    CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "crates.io",
        "name": "surrealdb"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "last_affected": "3.1.3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [],
  "database_specific": {
    "cwe_ids": [
      "CWE-863"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-09-04T19:48:29Z",
    "nvd_published_at": "2026-07-20T12:19:43Z",
    "severity": "HIGH"
  },
  "details": "## Duplicate Advisory\n\nThis advisory has been withdrawn because it is a duplicate of\u00a0GHSA-8rw6-p7m8-63jp. This link is maintained to preserve external references.\n\n## Original Description\nSurrealDB versions before 3.1.4 fail to properly enforce SELECT permissions on array elements (field.*) for record users, leaking denied array elements instead of hiding them. Attackers with record scope access can read array elements that element-level permissions should deny by exploiting incorrect index handling during permission filtering.",
  "id": "GHSA-j6mj-v752-pp4x",
  "modified": "2026-09-04T19:48:29Z",
  "published": "2026-07-20T12:33:08Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/surrealdb/surrealdb/security/advisories/GHSA-8rw6-p7m8-63jp"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-63740"
    },
    {
      "type": "WEB",
      "url": "https://www.vulncheck.com/advisories/surrealdb-before-array-element-permission-bypass"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Duplicate Advisory: SurrealDB: Array element-level (field.*) SELECT permissions leak denied elements to record users",
  "withdrawn": "2026-09-04T19:48:29Z"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

CVE-2026-63740 (GCVE-0-2026-63740)

FKIE_CVE-2026-63740

GHSA-8RW6-P7M8-63JP

Impact

Patches

Workarounds

Resources

GHSA-J6MJ-V752-PP4X

Duplicate Advisory

Original Description

Tags

Sightings

Nomenclature

Related by attack behaviour