What is the CVSS score of CVE-2026-1868?

CVE-2026-1868 has a CVSS 3.1 base score of 9.9 (Critical). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H. EPSS exploitation probability: 0.0%.

How to fix or mitigate CVE-2026-1868?

Within 24 hours: inventory all GitLab AI Gateway instances and isolate affected systems from production networks if possible; enable enhanced logging and monitoring. Within 7 days: implement network segmentation to restrict access to the Duo Workflow Service component; apply WAF rules to block suspicious traffic patterns; disable the Duo Workflow Service if operationally feasible. Within 30 days: monitor GitLab security advisories for patch availability; conduct a comprehensive risk assessment of exposed systems; develop an emergency patching plan for immediate deployment when available.

AI / ML CVE-2026-1868

CRITICAL

Improper Neutralization of Special Elements Used in a Template Engine (CWE-1336)

2026-02-09 cve@gitlab.com

Denial Of Service Gitlab AI / ML

9.9

CVSS 3.1 · NVD

View

Attack ChainAIDerived

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

Access

Authenticate to GitLab AI Gateway
Exploit

Craft malicious Duo Agent Platform Flow definition
Execution

Submit via API with template injection payload
Impact

Execute arbitrary code on Gateway service

Vulnerability Assessment

Weakness	CWE CWE-1336 OWASP Top 10:2025 A06:2021 - Vulnerable and Outdated Components ASVS 5.0 V1 - Encoding and Sanitization Template injection prevention
Exploitation Conditions	Authenticated user account on GitLab AI Gateway; ability to create or modify Duo Agent Platform Flow definitions; vulnerable versions 18.1.6–18.8.0 (excluding patched 18.6.2, 18.7.1, 18.8.1) with Duo Workflow Service component enabled.
Impact	CVSS 9.9 — GitLab's AI infrastructure processes code and repository data. SSTI enables accessing all data flowing through the AI pipeline.
Exploit ScenarioDerived	An attacker injects template syntax into AI workflow inputs that gets evaluated by the server, executing code with access to GitLab's AI infrastructure and potentially repository data.

Act Now Prioritize within 24-48h. Why: CRITICAL severity.

No patch listed yet 0.0% exploitation probability (EPSS)

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AnalysisAIv1 – Mar 12, 2026

GitLab AI Gateway's Duo Workflow Service has a CVSS 9.9 server-side template injection enabling code execution through the AI workflow system.

Earlier versions of this analysis (1)

v1 Mar 12, 2026 - 21:54 CVSS 9.9

SSTI in GitLab AI Gateway Duo Workflow enables RCE through AI workflows.

RemediationAI

Apply GitLab patches. Use sandboxed template rendering.

Affected ProductsAI

GitLab AI Gateway (Duo Workflow Service)

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

The Duo Workflow Service in GitLab AI Gateway has a CWE-1336 SSTI vulnerability that allows attackers to inject template expressions that execute arbitrary code on the GitLab AI infrastructure.

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Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

NVD PRIMARY 9.9 CRITICAL

AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Changed

Confidentiality

High

Integrity

High

Availability

High

DescriptionCVE.org

GitLab has remediated a vulnerability in the Duo Workflow Service component of GitLab AI Gateway affecting all versions of the AI Gateway from 18.1.6, 18.2.6, 18.3.1 to 18.6.1, 18.7.0, and 18.8.0 in which AI Gateway was vulnerable to insecure template expansion of user supplied data via crafted Duo Agent Platform Flow definitions. This vulnerability could be used to cause Denial of Service or gain code execution on the Gateway. This has been fixed in versions 18.6.2, 18.7.1, and 18.8.1 of the GitLab AI Gateway.

Executive ViewAI

Why It Matters

A critical vulnerability (CVSS 9.9) in GitLab AI Gateway's Duo Workflow Service affects all instances without an available patch, creating immediate risk of unauthorized access or system compromise. Organizations using this component face potential data breach, service disruption, and compliance violations until mitigation measures are implemented.

Business Impact: Severe

Compensating Controls

Network segmentation to restrict Duo Workflow Service access; Web Application Firewall (WAF) rules to filter malicious requests; disable or restrict the Duo Workflow Service component if business operations allow; implement strict access controls (IP whitelisting, VPN requirements) to the GitLab AI Gateway; increase monitoring and alerting for suspicious activities targeting this component; isolate affected systems from sensitive data and critical infrastructure.

Threat Intelligence Overview

EPSS Score

0.0%

Top 92% exploitable

Data Quality

3 sources

Confidence: Low

NVD

CVE.org

EPSS

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 CRITICAL

CISA KEV No

Public POC No

EPSS 0.0%

Patch available No

Active threat No

Deciding rule

CRITICAL severity

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· derived

None

System Exposure· derived

Open

Automatable· derived

Human Impact

Very High

Priority Score

Low Medium High Critical

KEV: 0

EPSS: 0

CVSS: +50

PoC: 0

Weaponized: 0

Threat intel: 0

Gov advisory: 0

Attack Technique

Denial of Service MEDIUM

Denial of Service attacks render applications or systems unavailable by overwhelming resources or triggering failure conditions.

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References

Advisories & patches

REF https://about.gitlab.com/releases/2026/02/06/patch-release-gitlab-ai-gateway-18-8-1-released/ REF https://gitlab.com/gitlab-org/modelops/applied-ml/code-suggestions/ai-assist/-/work_items/1850

Search Externally

GitHub PoC

Exploit-DB PacketStorm Snyk Rapid7 Nuclei Templates Trickest PoC

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