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

CVE-2026-23520 has a contested CVSS base score of 9.0 from a third party (e.g. CISA-ADP), while the vendor rates it Critical. vuln.today uses the vendor rating as authoritative.

Which versions of Docker are affected by CVE-2026-23520?

CVE-2026-23520 presents critical security risk, a OS command injection vulnerability rated CVSS 9.0.. A patch is available.

Is there a public PoC exploit available for CVE-2026-23520?

Yes, a public proof-of-concept exploit is available for CVE-2026-23520. Prioritise patching immediately. EPSS: 0.0%.

How to fix or mitigate CVE-2026-23520?

Within 24 hours: Identify all affected systems and apply vendor patches immediately. Validate that input sanitization is in place for all user-controlled parameters.

Docker CVE-2026-23520

CRITICAL

OS Command Injection (CWE-78)

2026-01-15 security-advisories@github.com

GHSA-gjqq-6r35-w3r8

Docker Command Injection Arcane Suse

Critical

Disputed · 9.0 NVD

Severity by source

Sources disagree (Low–Critical)

GitHub Advisory PRIMARY

9.0 CRITICAL

AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H

SUSE

3.1 LOW

AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H

vuln.today treats the vendor’s rating as authoritative. A higher third-party CVSS (e.g. CISA-ADP) is shown for transparency but does not drive the headline severity.

CVSS VectorGitHub Advisory

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

Required

Scope

Changed

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

Patch released

Mar 31, 2026 - 21:13 nvd

Patch available

Analysis Generated

Mar 12, 2026 - 21:54 vuln.today

PoC Detected

Feb 05, 2026 - 21:37 vuln.today

Public exploit code

CVE Published

Jan 15, 2026 - 20:16 nvd

CRITICAL 9.0

DescriptionGitHub Advisory

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.

AnalysisAI

Arcane Docker management tool before 1.13.0 has command injection in lifecycle labels. Container labels are passed to /bin/sh -c without sanitization, enabling RCE. PoC available.

Technical ContextAI

The pre-update and post-update lifecycle labels are passed directly to /bin/sh -c (CWE-78). An attacker who can set container labels can inject arbitrary commands.