CVE-2026-42298

CRITICALNVD 10.010.0—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 10.0 under NVD CVSS v3. EPSS exploit probability: 0.5%, top 61% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
10.0
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 1%CVSS: 10.0Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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 v3
10.0
EG Score
10.0(medium)
EPSS
39.7%
KEV
Not listed

Published

May 8, 2026

Last Modified

June 1, 2026

Advisory Details (2)

Auto-updated Jul 14, 2026
Patch available. Sources: github_commit, github.
github Patch Available

Arbitrary Code Execution and Token Exfiltration in pr-docker-build.yml via untrusted Dockerfile.dev · Advisory · gitroomhq/postiz-app · GitHub

https://github.com/gitroomhq/postiz-app/security/advisories/GHSA-v975-9h5p-xhm4
github_commit Patch Available

commit da448012dd87 (gitroomhq/postiz-app)

Patch available: gitroomhq/postiz-app v2.21.7 (contains commit da448012dd87)

https://github.com/gitroomhq/postiz-app/commit/da448012dd87e94944cbe83a38e7fd023269ec46

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 8× in last 7d / 42× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 176 total refreshes for this CVE.

  1. 2026-07-16 17:03 UTCEPSS rescore
  2. 2026-07-16 09:53 UTCOSV refresh
  3. 2026-07-15 16:57 UTCEPSS rescore
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  1. 2026-06-27 10:43 UTCEG score recompute
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  73. 2026-06-07 14:31 UTCEG score recompute
  74. 2026-06-07 10:33 UTCEG score recompute
  75. 2026-06-07 06:36 UTCEG score recompute

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Frequently asked(5)

What is CVE-2026-42298?
CVE-2026-42298 is a critical vulnerability published on May 8, 2026. 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…
When was CVE-2026-42298 disclosed?
CVE-2026-42298 was first published in the National Vulnerability Database on May 8, 2026, with the most recent update on June 1, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-42298 actively exploited?
CVE-2026-42298 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 39.7% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-42298?
CVE-2026-42298 has a CVSS v3 base score of 10.0 (NVD).
How do I remediate CVE-2026-42298?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-42298, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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