External risk intelligence

ServiceNow AI Platform Code Injection Vulnerability

CVE advisorySeverity: CRITICAL (CVSS 10.0)

CVE-2026-18885

ServiceNow platforms function as enterprise-wide service management gateways and portals. These systems are designed to be accessible to users and integrated services over the internet, making them typical internet-facing service platforms.

Code Injection

Halo Surface Signal: 5 out of 5 — more likely to be public-facing.

External exposure likelihood

Horizon Alert

Summary of the vulnerability and why it matters

ServiceNow has addressed a critical code injection flaw within its AI platform, which could have allowed unauthenticated attackers to execute arbitrary code and potentially access or alter sensitive instance data. While exploitation is not currently known, a security update has been released.

Unauthenticated code execution on ServiceNow AI.
Confirms platform integrity and data protection.
Verify AI platform security updates.

Attack Path

How an attacker could exploit the issue

An attacker could exploit this vulnerability by sending a crafted request to the ServiceNow platform. This could allow an unauthenticated user to inject malicious code, potentially leading to unauthorized access or modification of sensitive instance data.

Entry condition: Unauthenticated access required.
Trigger point: Sending a crafted request to the platform.
Resulting risk: Arbitrary code execution and data compromise.

Live Threat

Current exploitation, exposure, and threat context

A code injection vulnerability in the ServiceNow AI platform could allow an unauthenticated user to run arbitrary code. This could lead to unauthorized access to or modification of instance data.

Instance data could be accessed or modified.
Unauthenticated users could execute arbitrary code.
Unauthorized data access and modification.

Operational Fix

Recommended remediation, mitigation, and detection steps

ServiceNow platform owners and infrastructure teams are likely responsible for addressing this vulnerability. The first practical step is to identify all ServiceNow instances, assess their business criticality and reachability, and then confirm ownership before planning remediation.

ServiceNow platform owners.
Verify instance reachability and criticality.
Plan and deploy security updates.

Supplementary metadata

CVSS vector

Validate whether this threat affects your internet-facing exposure.

Halo Threat Intelligence helps prioritize remediation with Halo Surface Signal and H/A/L/O context. Start exposure validation with a free external attack surface trial.

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Frequently asked questions

What is the ServiceNow AI platform?

ServiceNow is an enterprise-grade cloud computing platform used by organizations to manage workflows, IT services, and business operations. The AI platform component specifically integrates artificial intelligence capabilities to automate processes, analyze data, and assist users within this broader service management ecosystem.

How does this code injection vulnerability work in CVE-2026-18885?

This vulnerability is a code injection flaw. It occurs when a system improperly handles user-provided data, allowing an attacker to insert and execute their own unauthorized commands. In this case, the flaw allows the ServiceNow AI platform to run unintended code, which can compromise the integrity of the system and the confidentiality of the data it processes.

Do I need special access to trigger this vulnerability?

No. The flaw is reachable by an unauthenticated user, meaning an attacker does not need an existing account or login credentials to attempt an exploit. Simply sending a specifically crafted request to the platform is sufficient to trigger the issue, provided the instance has not been updated with the security fix.

Why is this CVE considered high risk for internet-facing systems?

According to Halo Surface Signal, ServiceNow platforms often function as enterprise-wide service management gateways. Because they are typically designed to be accessible via the internet to support users and integrated services, they are highly visible. This accessibility increases the likelihood that an attacker could identify and reach a vulnerable instance.

When should I update my ServiceNow instance?

You should prioritize updates immediately. If you operate a ServiceNow instance, verify your current version and apply the provided security updates or patches as soon as possible. Confirming the security status of your platform is the essential first step to protecting your instance data from unauthorized access or modification.

References

support.servicenow.com/kb?id=kb_article_view&sysparm_article=KB3152242

Written by Nicholas Merritt

Nicholas Merritt is VP of Security Solutions at Halo Security. With more than 25 years across application security, vulnerability prioritization, and offensive security, he helps teams translate threat data into practical exposure validation and remediation focus. He authors Halo Threat Intelligence CVE advisories using Halo Surface Signal and H/A/L/O context to prioritize internet-facing risk.