CVE-2026-40242: Arcane is an interface for managing Docker containers, images, networks, and volumes

Q: How do I fix CVE-2026-40242?

arcane: upgrade to 1.17.3. Exact commands for each OS are on this page.

Q: Is CVE-2026-40242 being exploited?

CVE-2026-40242 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-40242 affect?

CVE-2026-40242 affects arcane. Severity is high (CVSS 7.2). 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

Q: How urgent is CVE-2026-40242?

Priority 53/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action; On your watchlist

This week

HIGH 7.2REMOTEWATCHLISTUPGRADE

CVE-2026-40242 is a high-severity flaw (CVSS 7.2) affecting arcane. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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

Why this priority

High severity
Public exploit reference
Remotely exploitable, no login, no user action
On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	7.2 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.6% (top 51%)
CISA exploited list	No
Weakness	CWE-918
Published	2026-04-10
Last modified	2026-10-26

Publisher (CNA): GitHub, Inc. · Vendor: getarcane

Last updated 2026-10-26 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-04-10 21:16 UTCPublished CVE record published
2026-10-26 21:10 UTCUpdated Record last modified

getarcane arcane UPGRADE

Affected: < 1.17.3

Fixed in: 1.17.3

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy arcane || rpm -q arcane || arcane --version

2. UPGRADE to 1.17.3 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade arcane

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade arcane

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Nuclei scan template: Arcane <= 1.17.2 - Server-Side Request Forgery

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-40242?

arcane: upgrade to 1.17.3. Exact commands for each OS are on this page.

Is CVE-2026-40242 being exploited?

CVE-2026-40242 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-40242 affect?

CVE-2026-40242 affects arcane. Severity is high (CVSS 7.2). 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

How urgent is CVE-2026-40242?

Priority 53/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action; On your watchlist

Software pages

Docker vulnerabilities

References

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