CVE-2026-6875: Detecting and Patching ServiceNow AI Platform Sandbox Escape

Introduction

Defenders need to mobilize immediately. A critical vulnerability, tracked as CVE-2026-6875, has been disclosed in the ServiceNow AI Platform. According to threat intelligence from Defused Cyber, this flaw is not just theoretical—it is currently being exploited in the wild.

With a CVSS score of 9.5, this vulnerability represents a severe risk to enterprise integrity. The issue is a sandbox escape vulnerability that allows unauthenticated attackers to execute arbitrary code. Given the privileged position ServiceNow holds in IT and security workflows, a successful compromise of this platform provides threat actors with a potent springboard for lateral movement, data exfiltration, and persistent access.

Technical Analysis

Affected Products and Platforms

The vulnerability specifically targets the ServiceNow AI Platform. While ServiceNow is predominantly a SaaS provider, the AI platform components often integrate deeply with instance workflows.

CVE Identifier: CVE-2026-6875
CVSS Score: 9.5 (Critical)
Vulnerability Type: Sandbox Escape
Impact: Unauthenticated Remote Code Execution (RCE)

Attack Mechanics

A "sandbox escape" occurs when an attacker bypasses the isolation boundaries (the sandbox) meant to restrict code execution. In the context of ServiceNow AI, the platform likely executes untrusted AI models or scripts within a contained environment to prevent them from affecting the underlying host or tenant data.

The Attack Chain:

Discovery: The attacker identifies the vulnerable ServiceNow AI endpoint (no authentication required).
Payload Delivery: A malicious payload is sent to the AI component. This payload is designed to trigger the sandbox logic.
Escape: Exploiting a flaw in the isolation mechanism, the attacker breaks out of the sandbox environment.
Execution: The attacker gains the ability to run arbitrary commands on the underlying system context, potentially accessing data from other tenants or escalating privileges within the ServiceNow instance.

Exploitation Status

Status: CONFIRMED ACTIVE EXPLOITATION

Defused Cyber has observed threat actors actively leveraging this vulnerability. The "in-the-wild" designation means the window for patching is closing rapidly. Default assumptions should be that scanning and exploitation attempts are already occurring against public-facing ServiceNow instances.

Detection & Response

Due to the SaaS nature of ServiceNow, detection relies heavily on ingesting ServiceNow Logs (via CEF or Syslog) into your SIEM (e.g., Microsoft Sentinel) and monitoring for anomalies. Direct host-based detection (EDR) is generally not applicable to the underlying ServiceNow infrastructure, but you can detect the behaviors associated with the exploitation of the web application layer.

SIGMA Rules

The following rules focus on identifying suspicious process execution patterns (indicative of code execution) and specific API anomalies related to the AI platform within ingested logs.

YAML

---
title: ServiceNow AI Platform Potential Sandbox Escape (CVE-2026-6875)
id: a1b2c3d4-5678-90ab-cdef-1234567890ab
status: experimental
description: Detects suspicious command execution or shell spawn activity originating from ServiceNow AI components, indicative of a sandbox escape exploitation attempt.
references:
 - https://support.servicenow.com
author: Security Arsenal
date: 2026/07/10
tags:
 - attack.initial_access
 - attack.execution
 - attack.t1190
logsource:
 category: process_creation
 product: linux
detection:
 selection:
   ParentImage|endswith: '/java'
   Image|endswith:
     - '/bash'
     - '/sh'
     - '/zsh'
   CommandLine|contains:
     - 'curl'
     - 'wget'
     - 'nc'
   # Contextual check for ServiceNow environment if available via labels
   # This assumes logs are enriched with cloud service context
 filter:
   CommandLine|contains:
     - 'servicenow'
falsepositives:
 - Legitimate administrative debugging (rare)
level: critical
---
title: ServiceNow AI Anomalous API Access
id: b2c3d4e5-6789-01ab-cdef-234567890bcd
status: experimental
description: Detects high volume of POST requests to ServiceNow AI endpoints or endpoints returning HTTP 500 errors which may indicate exploitation attempts of CVE-2026-6875.
references:
 - https://attack.mitre.org/techniques/T1071
author: Security Arsenal
date: 2026/07/10
tags:
 - attack.initial_access
 - attack.web_shell
 - attack.t1505.003
logsource:
 category: webserver
 product: apache
detection:
 selection:
   cs-method: 'POST'
   cs-uri-stem|contains:
     - '/api/now/table/sn_ai_'
     - '/api/now/x_snfi_'
   sc-status:
     - 200
     - 500
 condition: selection
falsepositives:
 - Legitimate heavy usage of AI features during business hours
level: medium

KQL (Microsoft Sentinel)

Use this query to hunt for suspicious errors or access patterns in your ServiceNow logs ingested via Syslog or CEF.

KQL — Microsoft Sentinel / Defender

// Hunt for ServiceNow AI Platform anomalies and potential exploitation signs of CVE-2026-6875
Syslog  
| where Facility in ("ServiceNow", "servicenow") 
// Look for AI related endpoints or generic error bursts
| where Message has_all ("AI", "error") 
    or Message has "CVE-2026-6875" 
    or Message has "sandbox" 
// Filter for recent activity based on severity
| where SeverityLevel in ("Critical", "Error", "Warning") 
| project TimeGenerated, Computer, Message, ProcessName, SeverityLevel 
| summarize count() by TimeGenerated, bin(TimeGenerated, 5m), Message 
| where count_ > 5 
| order by TimeGenerated desc

Velociraptor VQL

If your organization maintains an on-premise component or related Linux infrastructure interacting with the ServiceNow API, use this VQL artifact to hunt for suspicious parent-child process relationships often seen in RCE exploits (Web server spawning a shell).

VQL — Velociraptor

-- Hunt for suspicious parent-child process relationships indicative of RCE
SELECT Parent.ProcessName AS ParentProcess, 
       Process.Name AS ChildProcess, 
       Process.CommandLine, 
       Process.Pid, 
       Process.Ctime 
FROM pslist() 
LEFT JOIN pslist() ON Parent.Pid = Process.Ppid 
WHERE Parent.ProcessName =~ 'java' 
  AND ChildProcess IN ('bash', 'sh', 'zsh', 'python', 'perl', 'nc') 
  AND Process.CommandLine !~ 'servicenow-agent' -- Filter known agents if present

Remediation Script (PowerShell)

This PowerShell script helps auditors verify the patch status of their ServiceNow instances by querying the ServiceNow Table API (if accessible) to check the instance version and patch release. Note: Actual patching is performed via the ServiceNow Admin UI.

PowerShell

# ServiceNow Instance Checker for CVE-2026-6875 Remediation Verification
# Requires: Valid ServiceNow credentials and REST API access

param(
    [string]$InstanceUrl = "https://<your-instance>.service-now.com",
    [string]$User = "admin",
    [string]$Pass
)

if (-not $Pass) {
    $Pass = Read-Host "Enter Password" -AsSecureString
    $BSTR = [System.Runtime.InteropServices.Marshal]::SecureStringToBSTR($Pass)
    $Pass = [System.Runtime.InteropServices.Marshal]::PtrToStringAuto($BSTR)
}

$Headers = @{
    "Authorization" = "Basic " + [Convert]::ToBase64String([Text.Encoding]::ASCII.GetBytes("$($User):$($Pass)"))
    "Accept" = "application/"
}

# Check Instance Version
$VersionTable = "sys_properties"
$Query = "name=glide.system.version"

try {
    $Uri = "$InstanceUrl/api/now/table/$VersionTable?sysparm_query=$Query"
    $Response = Invoke-RestMethod -Uri $Uri -Method Get -Headers $Headers
    
    Write-Host "Current Instance Version:" $Response.result.value -ForegroundColor Cyan
    
    # Check against known patched versions (Update this list per official advisory)
    # This is a placeholder for logic. Defenders should manually verify against Advisory.
    Write-Host "Please verify this version against the CVE-2026-6875 security advisory." -ForegroundColor Yellow

}
catch {
    Write-Error "Failed to connect to ServiceNow API: $_"
}

Remediation

Patch Immediately: ServiceNow has released patches for this flaw. Navigate to System Diagnostics > Patch and Upgrade or check the "Hi" (High Security) instance updates in your Admin dashboard. Apply the relevant security patches as soon as maintenance windows allow.
Review AI Configuration: If immediate patching is impossible, audit the configuration of your ServiceNow AI Platform. Restrict access to the AI endpoints to trusted internal IP ranges via Access Control Lists (ACLs) if your instance architecture permits, or disable non-essential AI features temporarily.
Audit Logs: Conduct a forensic review of your ServiceNow system logs (specifically syslog, sys_audit, and HTTP access logs) dating back to the disclosure of CVE-2026-6875. Look for unusual script executions, new user creation, or unauthorized role changes.
Official Advisory: Refer to the official ServiceNow security advisory (search for CVE-2026-6875 on support.servicenow.com) for specific patched versions (e.g., Utah Patch 9, Washington DC Patch 4, etc.).

Related Resources

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