by Kastro
Paper/Archive/CVE-2026-42298

CVE-2026-42298

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

EPSS 0.5%CVSS 10.0
critical.is priorityof 100
39
CVSS 10.0 (CNA)10.0 / 10 × 3030.0Not in CISA KEV+300.0EPSS percentile 43.1.431 × 208.6No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

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.

Affected

ProductAffectedFixed inSource
postiz-app< da448012dd87e94944cbe83a38e7fd023269ec46–CNA

Scores by source

GitHub_M (CNA)10.0CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
NVD9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CISA ADPSSVCExploitation: none · Automatable: yes · Technical impact: total

References

refgithub.com/gitroomhq/postiz-app/security/advisories/GHSA-v975-9h5p-xhm4refgithub.com/gitroomhq/postiz-app/commit/da448012dd87e94944cbe83a38e7fd023269ec46