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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.

PUBLISHED Reserved 2026-04-26 | Published 2026-05-08 | Updated 2026-05-08 | Assigner GitHub_M




CRITICAL: 10.0CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Problem types

CWE-94: Improper Control of Generation of Code ('Code Injection')

Product status

< da448012dd87e94944cbe83a38e7fd023269ec46
affected

References

github.com/...iz-app/security/advisories/GHSA-v975-9h5p-xhm4

github.com/...ommit/da448012dd87e94944cbe83a38e7fd023269ec46

cve.org (CVE-2026-42298)

nvd.nist.gov (CVE-2026-42298)

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