CVE-2026-42298: Postiz is an AI social media scheduling tool

Q: How do I fix CVE-2026-42298?

postiz: upgrade to 2.21.7. Exact commands for each OS are on this page.

Q: Is CVE-2026-42298 being exploited?

CVE-2026-42298 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-42298 affect?

CVE-2026-42298 affects postiz. Severity is critical (CVSS 10.0). 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 arbitr

Q: How urgent is CVE-2026-42298?

Priority 51/100. Critical severity; Remotely exploitable, no login, no user action

This month

CRITICAL 10.0REMOTEUPGRADE

CVE-2026-42298 is a critical-severity flaw (CVSS 10.0) affecting postiz. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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 Do

Why this priority

Critical severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	10.0 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.5% (top 57%)
CISA exploited list	No
Weakness	CWE-94
Published	2026-05-08
Last modified	2026-07-24

Publisher (CNA): GitHub, Inc. · Vendor: gitroom

Last updated 2026-07-24 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-05-08 23:16 UTCPublished CVE record published
2026-07-24 21:10 UTCUpdated Record last modified

gitroom postiz UPGRADE

Affected: < 2.21.7

Fixed in: 2.21.7

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy postiz || rpm -q postiz || postiz --version

2. UPGRADE to 2.21.7 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade postiz

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade postiz

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-42298?

postiz: upgrade to 2.21.7. Exact commands for each OS are on this page.

Is CVE-2026-42298 being exploited?

CVE-2026-42298 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-42298 affect?

CVE-2026-42298 affects postiz. Severity is critical (CVSS 10.0). 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 arbitr

How urgent is CVE-2026-42298?

Priority 51/100. Critical severity; Remotely exploitable, no login, no user action

Software pages

Docker vulnerabilities · GitHub vulnerabilities

Related CVEs

CVE-2026-40168 HIGH 8.2 UPGRADE Postiz is an AI social media scheduling tool
CVE-2026-40487 HIGH 8.9 UPGRADE Postiz is an AI social media scheduling tool
CVE-2026-42556 HIGH 8.9 DOWNGRADE Postiz is an AI social media scheduling tool

References

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