Security readout for executives and security teams
Plain-English summary
A low-privileged ArcadeDB user can bypass authorization through asynchronous JavaScript commands and potentially create a server-wide administrator. Successful abuse could expose, alter, or disrupt every database managed by the server. ArcadeDB 26.8.1 fixes the flaw.
Executive priority
Treat as an immediate remediation priority. The vulnerability crosses a database security boundary and can convert minimal legitimate access into complete administrative control. Upgrade exposed systems first, restrict access during remediation, and investigate vulnerable servers for unauthorized administrator creation.
Technical view
ArcadeDB 26.7.3 and earlier do not propagate the authenticated principal to asynchronous command workers. With awaitResponse:false, the worker DatabaseContext lacks a bound user, making the scripting authorization gate ineffective. A read-only database user can consequently execute JavaScript with unrestricted host access and escalate privileges. This is classified as CWE-269 with CVSS 3.1 score 9.9.
Likely exposure
Exposure requires a vulnerable ArcadeDB server, access to the HTTP command endpoint, and valid credentials with at least read access to one database. Internet or broadly network-accessible deployments and widely issued low-privilege accounts face greater practical risk. The supplied sources do not quantify exposed installations.
Exploitation context
The described path is remotely reachable and requires low privileges, low complexity, and no user interaction. The source bundle reports that this CVE is not in KEV and provides no evidence of active exploitation. It does establish a credible route to server-wide administrative control.
Researcher notes
The core defect is missing security-context propagation across an asynchronous execution boundary, not credential-free authentication bypass. The authorization decision becomes ineffective because the worker has no bound principal. Assessment should focus on version, command-endpoint reachability, low-privilege account access, asynchronous JavaScript activity, and unexpected server-wide principals.
Mitigation direction
- Upgrade ArcadeDB server to version 26.8.1 or later.
- Prioritize externally reachable or broadly accessible ArcadeDB deployments.
- Restrict network access to the command API until upgrading is complete.
- Review server-wide administrators and revoke any unauthorized accounts.
- Consult the vendor advisory for deployment-specific guidance.
Validation and detection
- Inventory ArcadeDB server versions and identify installations running 26.7.3 or earlier.
- Confirm upgraded servers report version 26.8.1 or later.
- Identify which users can reach the HTTP command endpoint.
- Review server-wide administrator accounts for unexpected additions.
- If telemetry exists, investigate asynchronous JavaScript command activity.
- Validate authorization for asynchronous commands in a controlled, non-production environment.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-269: Authorization and privilege behavior lookup
Authorization weaknesses can support privilege escalation and valid-account review, depending on exploit path. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCredential and access behavior lookup
The CVE wording references authentication or credential exposure, so valid-account and credential-access review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupDatabase behavior lookup
The CVE wording references database injection or access, so collection and exfiltration review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2026-75851 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Critical
- CVSS
- 9.9 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
SSVC decision data
CVSS vector scores
2 official scoresWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H3.16VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H——VulnCheckVulnerability scoring details
Base CVSS 4.0 score
9.4CriticalVector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
Base CVSS 3.1 score
9.9CriticalVector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- CVE publishedCVE Program
The CVE record was published.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
Source materials
- CVE List V5 sourceCVE List V5
- GitHub Security Advisory (GHSA-5j4x-3jfw-8xv3)CVE reference, VulnCheck · vendor-advisory
- VulnCheck Advisory: ArcadeDB before 26.8.1 Authentication Bypass via Async CommandCVE reference, VulnCheck · third-party-advisory
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Improper Privilege Management
Improper Privilege Management represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.