CVE-2026-47125: Arcane: Missing admin authorization on global variables endpoint
Arcane is an interface for managing Docker containers, images, networks, and volumes. Prior to 1.19.2, the PUT /api/environments/{id}/templates/variables endpoint, which writes the system-wide .env.global file used for variable substitution in every project's compose file, is missing an admin authorization check. Any authenticated non-admin user can call this endpoint with their bearer token or API key and overwrite the global environment variables that are merged into every project deployment. By overriding values like REGISTRY, IMAGE, DATABASE_URL, or SECRET_KEY that other users reference via ${VAR} in compose files, an attacker can redirect image pulls to attacker-controlled registries (supply-chain RCE on the Docker host), exfiltrate database credentials, or disrupt all projects. This vulnerability is fixed in 1.19.2.
Security readout for executives and security teams
Plain-English summary
Arcane before 1.19.2 lets any logged-in non-admin change global variables used across project deployments. Because those variables can control images, registries, database URLs, and secrets, a low-privileged account could disrupt services or influence what gets deployed.
Executive priority
Treat this as urgent for Arcane environments with multiple users. A compromised or malicious non-admin account could affect deployments across projects, creating supply-chain, credential exposure, and outage risk.
Technical view
The PUT /api/environments/{id}/templates/variables endpoint lacks an admin authorization check. Authenticated non-admin users can overwrite the system-wide .env.global file used for compose variable substitution across projects. The advisory says this is fixed in Arcane 1.19.2.
Likely exposure
Organizations running getarcaneapp Arcane versions before 1.19.2 are exposed, especially where non-admin users or API keys exist. Exposure is higher if projects rely on shared global variables for images, registries, credentials, or secret keys.
Exploitation context
The source bundle does not show CISA KEV listing or other evidence of active exploitation. Exploitation requires authenticated access, but no user interaction and low complexity are indicated by CVSS 3.1 score 8.8.
Researcher notes
Evidence is limited to the CVE source bundle and GitHub advisory reference. The key issue is missing authorization, not authentication bypass. Do not assume public exploitation, affected forks, or mitigations beyond upgrade unless vendor sources confirm them.
Mitigation direction
Upgrade Arcane to version 1.19.2 or later.
Review vendor advisory for any additional operational guidance.
Limit Arcane access to trusted users until upgraded.
Audit API keys and remove unnecessary non-admin tokens.
Rotate credentials if global variables may have been modified.
Validation and detection
Inventory Arcane instances and confirm versions are 1.19.2 or later.
Review global variables for unexpected registry, image, database, or secret changes.
Check whether non-admin users or API keys can modify global variables.
Review available audit or access logs for non-admin updates to the endpoint.
Identify projects that consume shared variables through compose substitution.
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Potential ATT&CK relevance
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
cwe · medium confidence lookup
CWE-862: Authorization and privilege behavior lookup
Authorization weaknesses can support privilege escalation and valid-account review, depending on exploit path. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
The CVE wording references authentication or credential exposure, so valid-account and credential-access review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
The CVE wording references database injection or access, so collection and exfiltration review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
The affected technology mentions containers, so container-specific ATT&CK technique review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
1CVSS vectors
3Timeline events
1ADP providers
2Source links
SSVC decision data
CISA-ADPCISA Coordinator
Timestamp
Version
2.0.3
Exploitation: noneAutomatable: noTechnical Impact: total
CVSS vector scores
1 official score
We collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
CWE-862 · source CWE mapping
Missing Authorization
Missing Authorization represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.