What is the CVSS score of CVE-2026-26189?

CVE-2026-26189 has a CVSS 3.1 base score of 5.9 (Medium). CVSS vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:N. EPSS exploitation probability: 0.1%.

Which versions of Docker are affected by CVE-2026-26189?

CVE-2026-26189 presents moderate security risk, a OS command injection vulnerability rated CVSS 5.9. Exploitation could allow attackers to execute code or inject malicious input.. A patch is available.

How to fix or mitigate CVE-2026-26189?

Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. Validate input sanitization for user-controlled parameters.

Docker CVE-2026-26189

MEDIUM

OS Command Injection (CWE-78)

2026-02-19 security-advisories@github.com

Docker Github Command Injection Trivy Action

5.9

CVSS 3.1 · GitHub Advisory

Severity by source

GitHub Advisory PRIMARY

5.9 MEDIUM

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

Primary rating from GitHub Advisory · only source for this CVE.

CVSS VectorGitHub Advisory

CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:N

Attack Vector

Network

Attack Complexity

High

Privileges Required

High

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

None

Lifecycle Timeline

Analysis Generated

Mar 12, 2026 - 22:03 vuln.today

Patch released

Feb 26, 2026 - 02:55 nvd

Patch available

CVE Published

Feb 19, 2026 - 20:25 nvd

MEDIUM 5.9

DescriptionGitHub Advisory

Trivy Action runs Trivy as GitHub action to scan a Docker container image for vulnerabilities. A command injection vulnerability exists in aquasecurity/trivy-action versions 0.31.0 through 0.33.1 due to improper handling of action inputs when exporting environment variables. The action writes export VAR=<input> lines to trivy_envs.txt based on user-supplied inputs and subsequently sources this file in entrypoint.sh. Because input values are written without appropriate shell escaping, attacker-controlled input containing shell metacharacters (e.g., $(...), backticks, or other command substitution syntax) may be evaluated during the sourcing process. This can result in arbitrary command execution within the GitHub Actions runner context. Version 0.34.0 contains a patch for this issue. The vulnerability is exploitable when a consuming workflow passes attacker-controlled data into any action input that is written to trivy_envs.txt. Access to user input is required by the malicious actor. Workflows that do not pass attacker-controlled data into trivy-action inputs, workflows that upgrade to a patched version that properly escapes shell values or eliminates the source ./trivy_envs.txt pattern, and workflows where user input is not accessible are not affected.

AnalysisAI

Trivy Action versions 0.31.0 through 0.33.1 allow remote code execution on GitHub Actions runners due to insufficient input sanitization when constructing shell environment variable exports. An attacker with repository access can inject shell metacharacters through action inputs to achieve arbitrary command execution in the runner context. The vulnerability requires high privileges to exploit and is addressed in version 0.34.0.

Technical ContextAI

Classified as CWE-78 (OS Command Injection). Affects Trivy Action. Trivy Action runs Trivy as GitHub action to scan a Docker container image for vulnerabilities. A command injection vulnerability exists in aquasecurity/trivy-action versions 0.31.0 through 0.33.1 due to improper handling of action inputs when exporting environment variables. The action writes export VAR=<input> lines to trivy_envs.txt based on user-supplied inputs and subsequently sources this file in entrypoint.sh. Because input values are written without appropriate shell escaping, att