Security readout for executives and security teams
Plain-English summary
Arcane has a command injection flaw in its Docker volume browsing feature. A logged-in user with access to a browseable volume could make Arcane run unintended commands inside a helper container. This is not reported as remotely exploitable without credentials, but it can affect confidentiality, integrity, and availability within that container context.
Executive priority
Treat this as a prompt administrative remediation item, not a crisis. Prioritize Arcane instances with broad user access or sensitive Docker environments, because authenticated users could abuse management functionality to run unintended commands in a helper container.
Technical view
In Arcane 1.18.1 and earlier, the volume browse endpoint passes the path query parameter into a shell command. The sanitizer blocks path traversal but not shell substitution syntax. An authenticated user with volume browse access can execute commands inside the helper container, with some output reflected in error responses. CVSS is 6.3, CWE-78.
Likely exposure
Exposure is likely limited to organizations running Arcane 1.18.1 or earlier where authenticated users can browse Docker volumes. Risk increases if Arcane is reachable by many users, internet-accessible behind login, or managing sensitive container environments.
Exploitation context
The provided sources do not cite active exploitation, and this CVE is not marked KEV. Exploitation requires authentication and access to a browseable volume. The impact is described inside Arcane’s helper container, not as direct host compromise in the provided evidence.
Researcher notes
Evidence is centered on the GitHub security advisory and CVE record. The affected component is GET /environments/{id}/volumes/{volumeName}/browse via the path query parameter. Sources do not provide a fixed version, active exploitation evidence, or direct host escape impact.
Mitigation direction
- Check the GitHub advisory and vendor release notes for patched Arcane versions or official workarounds.
- Restrict Arcane access to trusted administrators until remediation is confirmed.
- Limit volume browsing permissions for nonessential users.
- Review helper container privileges and reduce access to sensitive Docker resources where possible.
- Monitor browse endpoint errors and helper-container activity for suspicious behavior.
Validation and detection
- Inventory Arcane deployments and confirm whether any run version 1.18.1 or earlier.
- Identify users or roles allowed to browse Docker volumes in Arcane.
- Confirm whether Arcane is reachable from the internet or broad internal networks.
- Review logs for unusual volume browse requests and repeated 500 responses.
- Validate remediation against vendor guidance in a non-production environment.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
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-78: Command execution behavior lookup
Command injection weaknesses can lead defenders to review execution techniques and command interpreter telemetry. 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.
Open ATT&CK lookupExecution behavior lookup
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.
Open ATT&CK lookupContainer behavior lookup
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.
Open ATT&CK lookupCVE-2026-45626 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Medium
- CVSS
- 6.3 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
CNA and ADP enrichment extracted from CVE v5
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.
SSVC decision data
CVSS vector scores
1 official scoreWe 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.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L2.83.4GitHub_MVulnerability scoring details
Base CVSS 3.1 score
6.3MediumVector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- CVE publishedCVE Program
The CVE record was published.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/getarcaneapp/arcane/security/advisories/GHSA-9mvm-4gwg-v8mpCVE reference, GitHub_M · x_refsource_CONFIRM
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.