CVE-2026-42298 | Postiz is an AI social media scheduling tool. Prior to commi… | CVSS 10.0 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.

Metadata

CVE ID: CVE-2026-42298
State: PUBLISHED
Assigner: GitHub_M
Reserved: 2026-04-26 12:13 UTC
Published: 2026-05-08 22:24 UTC
Last updated: 2026-05-11 18:02 UTC
Primary CWE: CWE-94
CWE-94: Improper Control of Generation of Code ('Code Inject…
Vendor / Product: gitroomhq / postiz-app
Sources: cve.org · NVD

Severity & Metrics

10.0 CRITICAL CVSS 3.1

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

SSVC — CISA Coordinator

Exploitation: none
Automatable: yes
Tech. Impact: total

Affected products (1)

Vendor	Product	Platform	Versions
gitroomhq	postiz-app	—	< da448012dd87e94944cbe83a38e7fd023269ec46

Weakness (CWE)

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

CVSS scores (1)

Score	Severity	Version	Source	Vector
10.0	CRITICAL	3.1	cna	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

References (2)

https://github.com/gitroomhq/postiz-app/security/advisories/GHSA-v975-9h5p-xhm4 https://github.com/gitroomhq/postiz-app/security/advisories/GHSA-v975-9h5p-xhm4
https://github.com/gitroomhq/postiz-app/commit/da448012dd87e94944cbe83a38e7fd023269ec46 https://github.com/gitroomhq/postiz-app/commit/da448012dd87e94944cbe83a38e7fd023269ec46