Vulnerability-Lookup

CVE-2026-65831 (GCVE-0-2026-65831)

Vulnerability from cvelistv5 – Published: 2026-09-15 15:18 – Updated: 2026-09-15 15:41

Title

ArcadeDB: Privilege escalation via reader role in /api/v1/command JS scripting language — arbitrary host file read

Summary

ArcadeDB is a Multi-Model DBMS. Prior to 26.7.1, a reader-role user can submit POST /api/v1/command/{database} with language: js because PolyglotQueryEngine.command, PolyglotQueryEngine.analyze, and PolyglotQueryEngine.registerFunctions do not enforce database-administrator authorization. GraalPolyglotEngine also permits scripts to bypass the allowedPackages whitelist by reflecting from the bound database object through database.getClass().getClassLoader().loadClass to arbitrary host classes. These cooperating defects allow a read-only database user to read arbitrary host files outside the database scope. Process creation is already blocked, so OS command execution is not confirmed. The issue is distinct from CVE-2026-44221, CVE-2026-54076, and CVE-2026-54077. This issue is fixed in version 26.7.1.

Severity

7.7 (High)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-15 15:38 UTC

CWE

CWE-269 - Improper Privilege Management
CWE-863 - Incorrect Authorization

Assigner

GitHub_M CNA under the mitre root

CNA scorecard C 72/100 over 7712 records in the last 180 days details

References

3 references

URL	Tags
https://github.com/ArcadeData/arcadedb/security/a…	x_refsource_CONFIRM
https://github.com/ArcadeData/arcadedb/commit/8ca…	x_refsource_MISC
https://github.com/ArcadeData/arcadedb/releases/t…	x_refsource_MISC

Impacted products

2 products

Vendor	Product	Version	CPE status
ArcadeData	arcadedb	Affected: < 26.7.1	guessed
com.arcadedb	arcadedb-server	Affected: < 26.7.1	guessed

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-65831

Vulnerability from fkie_nvd - Published: 2026-09-15 16:17 - Updated: 2026-09-30 17:51

Severity

7.7 (High) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N

Summary

References

	URL	Tags
	security-advisories@github.com	https://github.com/ArcadeData/arcadedb/commit/8ca396c07e471a0b97fee075eeb956b5e24a23be
	security-advisories@github.com	https://github.com/ArcadeData/arcadedb/releases/tag/26.7.1
	security-advisories@github.com	https://github.com/ArcadeData/arcadedb/security/advisories/GHSA-48qw-824m-86pr

Impacted products

	Vendor	Product	Version

JSON

To clipboard

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  "affected": [
    {
      "affectedData": [
        {
          "product": "arcadedb",
          "vendor": "ArcadeData",
          "versions": [
            {
              "status": "affected",
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        },
        {
          "product": "arcadedb-server",
          "vendor": "com.arcadedb",
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            {
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    }
  ],
  "id": "CVE-2026-65831",
  "lastModified": "2026-09-30T17:51:56.193",
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GHSA-48QW-824M-86PR

Vulnerability from github – Published: 2026-07-16 20:13 – Updated: 2026-07-16 20:13

Summary

ArcadeDB: Privilege escalation via reader role in /api/v1/command JS scripting language — arbitrary host file read

Details

Impact

A user holding only reader (read-only) privileges on a single database could execute arbitrary JVM code by sending a "language": "js" command to the POST /api/v1/command/{database} HTTP endpoint, and use it to read arbitrary files on the host filesystem (e.g. /etc/passwd, configuration files), outside the scope of the database itself.

Two cooperating defects made this possible:

Missing authorization on the scripting path (CWE-863 / CWE-269). Polyglot script execution (js and other GraalVM languages) never went through the database authorization checks applied to SQL/Cypher, so any authenticated principal - regardless of database role - could run scripts.
Sandbox whitelist bypass. The GraalVM sandbox restricts direct class lookups to a configured allowedPackages list, but a script could reach arbitrary classes by reflecting off the bound database object: database.getClass().getClassLoader().loadClass("java.io.File").

Process creation was already blocked (allowCreateProcess(false)), so the confirmed impact is host file read, not OS command execution. Confidentiality: High. Integrity/Availability: None.

This is a distinct entry point and root cause from CVE-2026-44221, CVE-2026-54076 and CVE-2026-54077, and is reproducible on builds that already contain those fixes.

Patches

The fix is applied in the engine so it covers every entry point (HTTP command, HA-forwarded commands, MCP analyze), not only the HTTP handler:

Polyglot script execution now requires the updateSecurity database-administrator permission on command, analyze and registerFunctions. The check runs on the request thread that carries the authenticated user and is a no-op in embedded mode and internal/system contexts (schema load, HA replication apply).
The GraalVM host-access policy now denies access to java.lang.Class, java.lang.ClassLoader and java.lang.reflect members, closing the reflection escape that bypassed allowedPackages - even for authorized administrators - while leaving normal method calls on bound objects and explicit Java.type(...) lookups (governed by allowedPackages) working.

Workarounds

Until upgraded, do not grant command/query access on the HTTP API to untrusted users, and treat any account that can reach /api/v1/command as capable of code execution. Note that after the fix, non-administrator accounts can no longer run js/polyglot scripts over HTTP.

Credit

Reported by @kyojune76.

Severity

7.7 (High)


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

Show details on source website

JSON

To clipboard

{
  "affected": [
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      "package": {
        "ecosystem": "Maven",
        "name": "com.arcadedb:arcadedb-server"
      },
      "ranges": [
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          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [],
  "database_specific": {
    "cwe_ids": [
      "CWE-269",
      "CWE-863"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-07-16T20:13:20Z",
    "nvd_published_at": null,
    "severity": "HIGH"
  },
  "details": "### Impact\n\nA user holding only `reader` (read-only) privileges on a single database could execute arbitrary JVM code by sending a `\"language\": \"js\"` command to the `POST /api/v1/command/{database}` HTTP endpoint, and use it to read arbitrary files on the host filesystem (e.g. `/etc/passwd`, configuration files), outside the scope of the database itself.\n\nTwo cooperating defects made this possible:\n\n1. **Missing authorization on the scripting path (CWE-863 / CWE-269).** Polyglot script execution (`js` and other GraalVM languages) never went through the database authorization checks applied to SQL/Cypher, so any authenticated principal - regardless of database role - could run scripts.\n2. **Sandbox whitelist bypass.** The GraalVM sandbox restricts direct class lookups to a configured `allowedPackages` list, but a script could reach arbitrary classes by reflecting off the bound `database` object: `database.getClass().getClassLoader().loadClass(\"java.io.File\")`.\n\nProcess creation was already blocked (`allowCreateProcess(false)`), so the confirmed impact is host **file read**, not OS command execution. Confidentiality: High. Integrity/Availability: None.\n\nThis is a distinct entry point and root cause from CVE-2026-44221, CVE-2026-54076 and CVE-2026-54077, and is reproducible on builds that already contain those fixes.\n\n### Patches\n\nThe fix is applied in the engine so it covers every entry point (HTTP command, HA-forwarded commands, MCP `analyze`), not only the HTTP handler:\n\n- Polyglot script execution now requires the `updateSecurity` database-administrator permission on `command`, `analyze` and `registerFunctions`. The check runs on the request thread that carries the authenticated user and is a no-op in embedded mode and internal/system contexts (schema load, HA replication apply).\n- The GraalVM host-access policy now denies access to `java.lang.Class`, `java.lang.ClassLoader` and `java.lang.reflect` members, closing the reflection escape that bypassed `allowedPackages` - even for authorized administrators - while leaving normal method calls on bound objects and explicit `Java.type(...)` lookups (governed by `allowedPackages`) working.\n\n### Workarounds\n\nUntil upgraded, do not grant command/query access on the HTTP API to untrusted users, and treat any account that can reach `/api/v1/command` as capable of code execution. Note that after the fix, non-administrator accounts can no longer run `js`/polyglot scripts over HTTP.\n\n### Credit\n\nReported by @kyojune76.",
  "id": "GHSA-48qw-824m-86pr",
  "modified": "2026-07-16T20:13:20Z",
  "published": "2026-07-16T20:13:20Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/ArcadeData/arcadedb/security/advisories/GHSA-48qw-824m-86pr"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/ArcadeData/arcadedb"
    },
    {
      "type": "WEB",
      "url": "https://github.com/ArcadeData/arcadedb/releases/tag/26.7.1"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "ArcadeDB: Privilege escalation via reader role in /api/v1/command JS scripting language \u2014 arbitrary host file read"
}

Sightings

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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.
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CVE-2026-65831 (GCVE-0-2026-65831)

FKIE_CVE-2026-65831

GHSA-48QW-824M-86PR

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