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Public proof of conceptFix available

CVE-2026-23520

Arcane has a Command Injection in Arcane Updater Lifecycle Labels Enables RCE

A public proof of concept exists; no exploitation attested.

  • Published2026-01-15
  • Fixed in1.13.0
  • WeaknessCWE-78

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

Arcane provides modern docker management. Prior to 1.13.0, Arcane has a command injection in the updater service. Arcane’s updater service supported lifecycle labels com.getarcaneapp.arcane.lifecycle.pre-update and com.getarcaneapp.arcane.lifecycle.post-update that allowed defining a command to run before or after a container update. The label value is passed directly to /bin/sh -c without sanitization or validation. Because any authenticated user (not limited to administrators) can create projects through the API, an attacker can create a project that specifies one of these lifecycle labels with a malicious command. When an administrator later triggers a container update (either manually or via scheduled update checks), Arcane reads the lifecycle label and executes its value as a shell command inside the container. This vulnerability is fixed in 1.13.0.

Timeline

dates in UTC
  1. 2026-01-1520:16CVE publishedNVD

Versions per branch

NVD · OSV
Arcane
BranchAffectedFixed in
1.13< 1.13.01.13.0
getarcaneapp/arcane/backend
BranchAffectedFixed in
0.0< 0.0.0-20260114065515-5a9c2f92e11f0.0.0-20260114065515-5a9c2f92e11f

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Products declared by the CNA1 product

As GitHub_M, the CNA that assigned this CVE, declared them in the CVE record; versions as written.

  • getarcaneapp arcane
    Affected
    • = < 1.13.0no fix stated

Source: the CNA record (CVE Program), © The MITRE Corporation,CVE Terms of UseCVE recordupdated 2026-01-15

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • govulncheck-vulndbopenSUSE:Leap 16.0all versions · fixed in 0.0.20260723T184607-160000.1.1
  • govulncheck-vulndbopenSUSE:Leap 15.6all versions · fixed in 0.0.20260123T022811-150000.1.140.1

Full record on NVD

Fix

  1. Update Arcane to 1.13.0

Advisories and patches

Detection

read 2026-11-01 01:02 UTC
Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
Published
2026-01-15
Last Modified
2026-06-17
NVD status
Analyzed
GitHub Advisory
GHSA-gjqq-6r35-w3r8

Frequently asked questions

What is CVE-2026-23520?

Arcane provides modern docker management. Prior to 1.13.0, Arcane has a command injection in the updater service. Arcane’s updater service supported lifecycle labels com.getarcaneapp.arcane.lifecycle.pre-update and com.getarcaneapp.arcane.lifecycle.post-update that allowed defining a command to run before or after a container update. The label value is passed directly to /bin/sh -c without sanitization or validation. Because any authenticated user (not limited to administrators) can create projects through the API, an attacker can create a project that specifies one of these lifecycle labels with a malicious command. When an administrator later triggers a container update (either manually or via scheduled update checks), Arcane reads the lifecycle label and executes its value as a shell command inside the container. This vulnerability is fixed in 1.13.0.

Is CVE-2026-23520 actively exploited?

Active exploitation of CVE-2026-23520 has not been confirmed. Its EPSS score was 1.8% on 2026-11-08, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2026-23520?

CVE-2026-23520 has a CVSS v3 base score of 8 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H.

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