Postiz: Arbitrary Code Execution and Token Exfiltration in pr-docker-build.yml via untrusted Dockerfile.dev

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.

Scores

EPSS (exploitation in 30 days)

0.50% · top 57% of all CVEs (6 Nov 2026)

CISA SSVC

Exploitation: none · Automatable: yes · Technical impact: total

The list uses the assigner's score when there is one, then CISA's, then NVD's: Critical 10.0.

Weakness

• CWE-94: Improper Control of Generation of Code ('Code Injection') (opens in a new tab)All about CWE-94 and its CVEs

Affected products

• gitroomhq · postiz-app

  • affected < da448012dd87e94944cbe83a38e7fd023269ec46

References (2)

• https://github.com/gitroomhq/postiz-app/security/advisories/GHSA-v975-9h5p-xhm4 (opens in a new tab)x_refsource_CONFIRM
• https://github.com/gitroomhq/postiz-app/commit/da448012dd87e94944cbe83a38e7fd023269ec46 (opens in a new tab)x_refsource_MISC

Sources

The same CVE in the primary databases and aggregators, to check against.

• CVE.org record (opens in a new tab)
• CVE List JSON (GitHub) (opens in a new tab)
• NVD (opens in a new tab)
• FIRST EPSS (opens in a new tab)
• OSV.dev (opens in a new tab)
• GitHub Advisories (opens in a new tab)
• CIRCL Vulnerability-Lookup (opens in a new tab)

Badge for a README or a ticket

[![CVE-2026-42298](https://trackcve.app/badge/CVE-2026-42298.svg)](https://trackcve.app/cve/CVE-2026-42298)

Record last updated 11 May 2026, 18:02 UTC.