CVE-2026-42298: Postiz Docker Image Build Allows Unauthenticated Code Execution

Summary

An attacker can create a malicious Docker image that executes code without needing a password. This could allow them to access sensitive information. To protect against this, ensure that you have the latest version of Postiz, which includes a fix for this issue.

What to do

No fix is available yet. Check with your software vendor for updates.

Affected software

Vendor	Product	Affected versions
gitroom	postiz	< 2.21.7 `cpe:2.3:a:gitroom:postiz::::::::`

Original title

Postiz is an AI social media scheduling tool. Prior to commit da44801, a "Pwn Request" vulnerability in the Build and Publish PR Docker Image workflow (.github/workflows/pr-docker-build.yml) allows...

Original description

Postiz is an AI social media scheduling tool. Prior to commit da44801, a "Pwn Request" vulnerability in the Build and Publish PR Docker Image workflow (.github/workflows/pr-docker-build.yml) allows any unauthenticated user to execute arbitrary code during the Docker build process and exfiltrate a highly privileged GITHUB_TOKEN (write-all permissions). This can be achieved simply by opening a Pull Request from a fork with a maliciously modified Dockerfile.dev. This issue has been patched via commit da44801.

nvd CVSS3.1 10.0

Vulnerability type

CWE-94 Code Injection