How broadly exploitable is this vulnerability?

Any user who can successfully log in to an affected Neko instance can potentially exploit the flaw; no special administrator credentials are required, so the exposure is as broad as the instance's user base.

What level of access does an attacker need?

The attacker needs only a valid, non-admin account on the Neko instance. Once authenticated, the broken authorization logic can allow them to perform administrative actions or promote themselves to an admin-equivalent role.

What is the safest general fix pattern for this issue?

The safest approach is to enforce strict role-based access control on every administrative operation and to centralize authorization checks so that admin-only actions cannot be invoked without explicit verification of the caller's privileges.

Severity:

HIGH RISK

(8.8)

Broken Authorization & Privilege Escalation (CWE-269/CWE-284) in Neko Self-Hosted Virtual Browser

CVE-2026-39386

Published:

Apr 20, 2026

Status:

Analyzed

Summary

Affected Context

Exploit Preconditions

Why This Happens

Potential Impact

General Mitigation Guidance

How Teams Detect Issues Like This

Frequently Asked Questions

Source

NDV

Recent Vulnerabilities

CWE-74;CWE-89

HIGH RISK

HIGH

(7.3)

SQL Injection via Unsanitized ID Parameter (CWE-89) in Pharmacy Sales and Inventory System /ajax.php

Database Compromise and Data Integrity Loss

April 27, 2026

CWE-863

HIGH RISK

HIGH

(8.5)

Incorrect Authorization (CWE-863) in OpenClaw chat.send Session Management

Privilege Escalation and Unauthorized Session Control

April 27, 2026

Vulnerability Type

Category:

Broken Access Control / Privilege Escalation

CWE:

CWE-20;CWE-269;CWE-284;CWE-639;CWE-862

Impact:

Full Administrative Takeover of Neko Instance

Severity:

HIGH RISK

(8.8)

CVSS Version:

3.1

Vulnerability Type

Category:

Broken Access Control / Privilege Escalation

CWE:

CWE-20;CWE-269;CWE-284;CWE-639;CWE-862

Impact:

Full Administrative Takeover of Neko Instance

Severity:

HIGH RISK

(8.8)

CVSS Version:

3.1

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Broken Authorization & Privilege Escalation (CWE-269/CWE-284) in Neko Self-Hosted Virtual Browser

Summary

Affected Context

Exploit Preconditions

Why This Happens

Potential Impact

General Mitigation Guidance

How Teams Detect Issues Like This

Frequently Asked Questions

Source

Recent Vulnerabilities

HIGH RISK

HIGH

(7.3)

SQL Injection via Unsanitized ID Parameter (CWE-89) in Pharmacy Sales and Inventory System /ajax.php

HIGH RISK

HIGH

(8.5)

Incorrect Authorization (CWE-863) in OpenClaw chat.send Session Management

Vulnerability Type

Vulnerability Type

Vulnerability Type

Catch This CVE While Code Is Being Written

Ship clean & secure code faster

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