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CVE-2026-42298

Gitroom Postiz remote code execution

10.0 CRITICALEPSS 0.81%
  1. Published8 May 2026

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.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeChanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Affected products

Gitroom Postiz< 2.21.7

Remediation

Fixed in
Gitroom Postiz≥ 2.21.7

References

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Frequently asked

Is CVE-2026-42298 being actively exploited?

CVE-2026-42298 is not in the CISA KEV catalog. Its EPSS exploit probability is 0.81%.

How severe is CVE-2026-42298?

CVE-2026-42298 has a CVSS 3.1 base score of 10.0, rated critical. EPSS estimates a 0.81% probability of exploitation.

Which products are affected by CVE-2026-42298?

Affected products include Gitroom Postiz.

How do I fix CVE-2026-42298?

Upgrade affected software to a fixed version, for example Gitroom Postiz 2.21.7 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-42298 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.