High severity7.2NVD Advisory· Published Apr 10, 2026· Updated Apr 21, 2026
CVE-2026-40242
CVE-2026-40242
Description
Arcane is an interface for managing Docker containers, images, networks, and volumes. Prior to 1.17.3, the /api/templates/fetch endpoint accepts a caller-supplied url parameter and performs a server-side HTTP GET request to that URL without authentication and without URL scheme or host validation. The server's response is returned directly to the caller. type. This constitutes an unauthenticated SSRF vulnerability affecting any publicly reachable Arcane instance. This vulnerability is fixed in 1.17.3.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
github.com/getarcaneapp/arcane/backendGo | < 1.17.3 | 1.17.3 |
Affected products
1Patches
0No patches discovered yet.
Vulnerability mechanics
AI mechanics synthesis has not run for this CVE yet.
References
4- github.com/getarcaneapp/arcane/security/advisories/GHSA-ff24-4prj-gpmjnvdExploitVendor AdvisoryWEB
- github.com/advisories/GHSA-ff24-4prj-gpmjghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2026-40242ghsaADVISORY
- github.com/getarcaneapp/arcane/releases/tag/v1.17.3nvdRelease NotesWEB
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