CVE-2026-42298
Critical
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.
SeverityCritical
CVSS10.0
Exploit probability—
ProductGitroom Postiz
PublishedMay 8, 2026
First seenMay 8, 2026
Weakness typeCWE-94Code injection
How to fix
Update
- gitroom postiz2.21.7 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| gitroom postiz | v < 2.21.7 | 2.21.7 |
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