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ServiceNow AI Platform CVE-2026-6877

| EUVDEUVD-2026-113340 MEDIUM
Improper Access Control (CWE-284)
2026-10-29 SN GHSA-4rjv-xgwj-mw34
5.3
CVSS 4.0 · Vendor: SN
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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain

  1. Access
    Authenticate with required role
  2. Exploit
    Access Task Plan Templates record creation
  3. Execution
    Bypass domain separation check
  4. Impact
    Create records in unauthorized domains

Vulnerability Assessment

Weakness
CWE
OWASP Top 10:2025
A01:2025 - Broken Access Control
ASVS 5.0
V8 - Authorization Access control enforcement
MITRE ATT&CK

1 technique across 1 tactic: Defense Evasion

The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up.

Exploitation Conditions

Requires (1) a valid authenticated account on the ServiceNow instance holding the specific role referenced by the advisory, and (2) the instance to have the SR - CSM - Task Plan Templates Store application installed at a version prior to Task Plan Templates v3.0. The attack is limited to unauthorized record CREATION across domain boundaries - it does not grant read access to other domains' data (VC:N) or affect availability (VA:N). Limiting factors: exploitation is bounded to users who already possess the required role (PR:L), the vulnerable store application must be present (it is not part of every ServiceNow deployment), and only domain-scoped data integrity is at risk. The exact role name and the precise record-creation path that bypasses the domain check are not detailed in the available sources.

Impact

This is a medium-severity authorization (domain separation) flaw, not a high-priority emergency. The CVSS 4.0 vector (AV:N/AC:L/AT:N/PR:L/UI:N) confirms network-reachable, low-complexity exploitation but requires an authenticated user holding a specific role (PR:L), and impact is limited to low integrity (VI:L) - unauthorized cross-domain record CREATION only, with no confidentiality (VC:N) or availability (VA:N) impact. The vuln.today decision label is 'this_month', not act_now or emergency, consistent with a moderate-risk access-control issue. ServiceNow explicitly states it is 'not currently aware of malicious exploitation,' so there is no KEV listing and no confirmed active exploitation. No EPSS score and no POC/exploit reference were provided in the input, so exploitation probability cannot be quantified from the data. The signals are mutually consistent: a real but bounded insider/authorized-user authorization weakness rather than a widely-weaponized remote threat. The main residual risk is from users who already have legitimate (but role-scoped) access abusing the domain boundary to inject data they should not be able to create.

Exploit ScenarioDerived

An authenticated ServiceNow user who holds the specific required role on an instance running the SR - CSM - Task Plan Templates Store application (pre-v3.0) uses the application's record-creation functionality to write records into business domains outside their authorized scope. Because the attack vector is network with low complexity and no user interaction, a single logged-in actor can perform this directly through normal application workflows. No public exploit code or PoC reference was provided in the input.

This Month Plan within 30 days. Why: MEDIUM severity (CVSS 4.0-6.9).
No patch listed yet 0.3% exploitation probability (EPSS)

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AnalysisAIv1 – Oct 29, 2026

Domain separation bypass in ServiceNow AI Platform's SR - CSM - Task Plan Templates Store application allows an authenticated user with a specific role to create records in domains they do not have access to. Only deployments with the affected store application before Task Plan Templates v3.0 are implicated; the impact is limited to cross-domain data integrity, with confidentiality and availability unaffected. No malicious exploitation has been reported and no public exploit identified at time of analysis; the issue is rated CVSS 5.3 medium.

RemediationAI

Vendor-released patch: Task Plan Templates v3.0. ServiceNow states it has addressed the issue and recommends customers promptly apply appropriate updates or upgrade to a patched release; the supplied version data identifies Task Plan Templates v3.0 as the fixed release for the affected store application, so deployments running earlier versions should upgrade to v3.0 or later. The vendor advisory is https://support.servicenow.com/kb?id=kb_article_view&sysparm_article=KB3228994. No workaround is documented in the supplied references, and ServiceNow's guidance identifies updating as the remediation path.

Affected VersionsENISA

ServiceNow AI Platform 0 <SR - CSM - Task Plan Templates v3.0 (Task Plan Templates application)

Affects your stack

Find out whether the stacks and servers you run are on an affected version.

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

ServiceNow AI Platform uses domain separation to isolate records and configuration between domains in multi-tenant or segregated deployments. CVE-2026-6877 is classified as CWE-284 improper access control: an authorization check on a record-creation path in the SR - CSM - Task Plan Templates Store application fails to enforce domain boundaries, allowing a user who already holds a specific role to create records in domains outside their permitted scope. The CPE identifies servicenow_ai_platform as the platform, and EUVD narrows the affected component to the SR - CSM - Task Plan Templates Store application at versions before Task Plan Templates v3.0. The assessed CVSS 3.1 vector is AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N, reflecting a remote, low-privilege integrity impact only. The exact role name and the precise record-creation path that bypasses the domain check are not detailed in the available sources.

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Severity by source

Vendor (SN) PRIMARY 5.3 MEDIUM
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
vuln.today AI 4.3 MEDIUM

Network-reachable application function (AV:N/AC:L) abused by an authenticated role-holding user (PR:L, no UI); only unauthorized cross-domain data creation, so I:L and C:A:N.

3.1 AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
4.0 AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N

Primary rating from Vendor (SN).

CVSS VectorVendor: SN

Attack Vector
Network
Attack Complexity
Low
Attack Requirements
None
Privileges Required
Low
User Interaction
None
Vulnerable system: Confidentiality
None
Vulnerable system: Integrity
Low
Vulnerable system: Availability
None
Subsequent system: Confidentiality
None
Subsequent system: Integrity
None
Subsequent system: Availability
None

DescriptionCVE.org

ServiceNow has addressed a domain separation bypass security issue that was identified in the ServiceNow SR - CSM - Task Plan Templates Store application. This vulnerability could enable an authenticated user with a specific role to create records in domains they do not have access to, potentially leading to unauthorized data creation across domain boundaries.

We are not currently aware of malicious exploitation against ServiceNow instances. We recommend customers promptly apply appropriate updates or upgrade to a patched release if they have not already done so.

Threat Intelligence Overview

EPSS Score
0.3%
Top 72% exploitable
Prevalence
Medium
ServiceNow is widely deployed, but this specific CSM store application is not in every instance
Social Media
1
Sightings
Data Quality
5 sources
Confidence: Medium

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity MEDIUM
CISA KEV No
Public POC No
EPSS 0.3%
Patch available No
Active threat No
Deciding rule
MEDIUM severity (CVSS 4.0-6.9)
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived
Scheduled
Exploitation
None
System Exposure· derived
Open
Automatable
No
Human Impact· derived
Medium
Technical Impact
Partial

Priority Score

26
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +26
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

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