CVE-2026-63748: SurrealDB Authenticated Callers Can Read Fields Vulnerability

MODERATE
Advisory Identifier: GHSA-6g9v-7gq3-p2c6
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CVSS 4.3
CWE-209
Published
Advisory Summary

CVE-2026-63748 is a MODERATE (CVSS 4.3) authenticated callers can read fields vulnerability (CWE-209: Generation of Error Message Containing Sensitive Information) affecting SurrealDB libraries in the crates.io ecosystem. The issue involves authenticated callers can read fields hidden by field-level select permissions via error messages. Remediation is available by upgrading affected packages to version 3.1.0.

CVE-2026-63748 at a Glance

CVE Identifier CVE-2026-63748
GHSA Identifier GHSA-6g9v-7gq3-p2c6
Severity MODERATE
CVSS v3.1 Base Score 4.3
CWE Classification CWE-209: Generation of Error Message Containing Sensitive Information
Affected Product SurrealDB
Package Ecosystem crates.io
Published Date
Last Updated

Security Impact

CVSS: 4.3

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:L/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 Low (C:L)
Integrity None (I:N)
Availability None (A:N)

How to Fix CVE-2026-63748

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-2026-63748, 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-209: Generation of Error Message Containing Sensitive Information, where the product generates an error message that includes sensitive information about its environment, users, or associated data. 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

A record user with UPDATE access could read field values that field-level SELECT permissions hid from them. Arithmetic operators and `extend` embedded the raw operand into their error messages, and UPDATE permission checks evaluate against the unreduced document — so triggering such an error against a hidden field returned its value in the resulting error. ### Impact A record user issues an UPDATE that performs an incompatible operation against a hidden field — e.g. `UPDATE person:me SET probe = email + 1` when `email` is a string — and reads the value from the returned error (`Tried to compute "alice@example.com" + 1 …`). One field per operation, but the attacker can repeat against any field on any record they can UPDATE. ### Patches A patch has been introduced that replaces the raw operand in every `try_*` operator and in `extend` with the operand's type name (`"string"`, `"int"`, `"array"`, etc.). - Versions 3.1.0 and later are not affected by this issue. ### Workarounds Affected users who are unable to update should not grant UPDATE permission on records whose field-level SELECT permissions are expected to hide values from the same caller.

CVE-2026-63748 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-6g9v-7gq3-p2c6
NVD — CVE-2026-63748 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-63748
Security Fix Commit FIX COMMIT
https://github.com/surrealdb/surrealdb/commit/0aaa332c79195e4c40275eb5224aed3d52f5cf90
SurrealDB Source Repository REPOSITORY
https://github.com/surrealdb/surrealdb
www.vulncheck.com/advisories/surreald... WEB
https://www.vulncheck.com/advisories/surrealdb-before-information-disclosure-via-error-messages

Frequently Asked Questions

What is CVE-2026-63748?
CVE-2026-63748 is a security vulnerability in SurrealDB involving Authenticated callers can read fields hidden by field-level SELECT permissions via error messages under CWE-209: Generation of Error Message Containing Sensitive Information.
Which SurrealDB versions are affected?
Affected versions include releases prior to 3.1.0 across affected packages: surrealdb.
What version fixes CVE-2026-63748?
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-2026-63748?
CVE-2026-63748 has a CVSS v3.1 base score of 4.3 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N.
What CWE is associated with CVE-2026-63748?
CVE-2026-63748 is classified under CWE-209: Generation of Error Message Containing Sensitive Information (The product generates an error message that includes sensitive information about its environment, users, or associated data.).
How can I check crates.io dependencies for CVE-2026-63748?
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-6g9v-7gq3-p2c6",
  "modified" : "2026-09-04T20:07:40Z",
  "published" : "2026-07-01T20:16:52Z",
  "aliases" : [ "CVE-2026-63748" ],
  "summary" : "SurrealDB: Authenticated callers can read fields hidden by field-level SELECT permissions via error messages",
  "details" : "A record user with UPDATE access could read field values that field-level SELECT permissions hid from them. Arithmetic operators and `extend` embedded the raw operand into their error messages, and UPDATE permission checks evaluate against the unreduced document — so triggering such an error against a hidden field returned its value in the resulting error.\n\n### Impact\n\nA record user issues an UPDATE that performs an incompatible operation against a hidden field — e.g. `UPDATE person:me SET probe = email + 1` when `email` is a string — and reads the value from the returned error (`Tried to compute \"alice@example.com\" + 1 …`). One field per operation, but the attacker can repeat against any field on any record they can UPDATE.\n\n### Patches\n\nA patch has been introduced that replaces the raw operand in every `try_*` operator and in `extend` with the operand's type name (`\"string\"`, `\"int\"`, `\"array\"`, etc.).\n\n- Versions 3.1.0 and later are not affected by this issue.\n\n### Workarounds\n\nAffected users who are unable to update should not grant UPDATE permission on records whose field-level SELECT permissions are expected to hide values from the same caller.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/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-6g9v-7gq3-p2c6"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-63748"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/surrealdb/surrealdb/commit/0aaa332c79195e4c40275eb5224aed3d52f5cf90"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/surrealdb/surrealdb"
  }, {
    "type" : "WEB",
    "url" : "https://www.vulncheck.com/advisories/surrealdb-before-information-disclosure-via-error-messages"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-209" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-07-01T20:16:52Z",
    "nvd_published_at" : null
  }
}