CVE-2026-86114

Arcane before 2.0.0 Missing Administrator Authorization on the Compose Template Mutation Endpoints

MEDIUM
6.5
CVSS Score
Published: September 5, 2026 at 09:59 AM UTC
Updated: September 23, 2026 at 05:30 PM UTC
2 products affected across 2 vendorsArcaneArcane

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Severity
MEDIUM6.5
Exploit prediction
EPSS 0.4%
SSVC
No known exploit

Description

Arcane versions before 2.0.0 fail to properly restrict template operations, allowing default user role accounts to create, modify, and delete compose templates including instance-wide defaults. Attackers can inject malicious container configurations with privileged settings or host path mounts that execute with administrative privileges when deployed by administrators.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

1.19.1 ≤ v < 2.0.0
Affected range stops below 2.0.0, so it looks safe — our inference, not a vendor statement
1.19.1 ≤ v < 2.0.01.19.1
Affected range stops below 2.0.0, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

6.5MEDIUMVulnCheck
Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
HIGH
Availability
NONE
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-862

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