CVE-2026-86114Network attack vector

Host privilege escalation via unguarded template mutations

Published Sep 5, 2026 · Updated Sep 5, 2026

Missing authorization in Arcane before 2.0.0 allows remote authenticated users to alter Compose templates through five mutation endpoints. Five registrations in backend/api/handlers/templates.go declare bearer or API-key authentication but omit administrator enforcement. A default-role account can poison a template with privileged containers or host mounts, but host-level execution requires an administrator to deploy it.

CVSS severity7.1
High
EPSS probability0.24%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Missing authorization in Arcane before 2.0.0 allows remote authenticated users to alter Compose templates through five mutation endpoints. Five registrations in backend/api/handlers/templates.go declare bearer or API-key authentication but omit administrator enforcement. A default-role account can poison a template with privileged containers or host mounts, but host-level execution requires an administrator to deploy it.

The record

CVE
CVE-2026-86114
Published
Sep 5, 2026
Updated
Sep 5, 2026
Vendor
Arcane
Product
Arcane
Classifications
CWE-862, T1204
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 5, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 5, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=1.19.1 <2.0.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Arcane · Arcaneversion=1.19.1 <2.0.0

Published CVSS scores

7.1VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-862Missing Authorization
T1204User Execution

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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