# CVE-2026-45626: Arcane: OS Command Injection in Volume Browser ListDirectory via path query parameter

> Authenticated users can execute arbitrary shell commands in the helper container via the volume browser path parameter due to insufficient input sanitization.

- **Severity:** Medium 6.3 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 29 May 2026
- **Updated:** 1 Jun 2026
- **Also known as:** GHSA-9mvm-4gwg-v8mp, GO-2026-5292

## What is CVE-2026-45626?

CVE-2026-45626 is a medium-severity command injection vulnerability in getarcaneapp arcane, published on 29 May 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

Arcane is an interface for managing Docker containers, images, networks, and volumes. In 1.18.1 and earlier, GET /environments/{id}/volumes/{volumeName}/browse accepts a path query parameter that is passed to a shell command (sh -c "find … | while …") inside an Arcane helper container. The path sanitiser blocks ../ traversal but does not strip Bourne-shell metacharacters such as $() or backticks, and strconv.Quote only escapes Go string metacharacters, not shell substitution sequences. Any authenticated user with access to a browseable volume can execute arbitrary commands inside the helper container; command output is reflected back in the 500 error body.

Weakness: CWE-78 (Improper Neutralization of Special Elements used in an OS Command)

## Which versions are affected by CVE-2026-45626?

3 open source packages ship an affected version, including github.com/getarcaneapp/arcane/backend.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `github.com/getarcaneapp/arcane/backend` | Go | All versions | None |
| `github.com/getarcaneapp/arcane/backend` | Go | All versions to 1.18.1 | None |
| `github.com/getarcaneapp/arcane/backend` | Go | All versions to 1.18.1 | None |

## How do I fix CVE-2026-45626?

Upgrade to a fixed version.

## Is CVE-2026-45626 being exploited?

There is no known exploitation of CVE-2026-45626 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-45626 and fix it if it is affected.

What it is: CVE-2026-45626 is a medium-severity command injection vulnerability in getarcaneapp arcane, published on 29 May 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-45626 in the wild and no public exploit code.

Affected packages and fixed versions:
- github.com/getarcaneapp/arcane/backend (Go): affected all versions; no fix listed
- github.com/getarcaneapp/arcane/backend (Go): affected all versions up to 1.18.1; no fix listed
- github.com/getarcaneapp/arcane/backend (Go): affected all versions up to 1.18.1; no fix listed

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-45626/ (Markdown: https://insights.sbomify.com/CVE-2026-45626/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-45626
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-45626
- OSV: https://osv.dev/vulnerability/CVE-2026-45626

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From sbomify Insights: https://insights.sbomify.com/CVE-2026-45626/
Summaries are generated and may contain mistakes; the official description above is the record.