CVE-2026-42298

CriticalRCE

Published: 08 May 2026

Published

08 May 2026

Modified

13 May 2026

KEV Added

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Patch

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CVSS Score 10.0 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

EPSS Score 0.0018 39.5th percentile

Risk Priority 20 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2026-42298 is a critical-severity Code Injection (CWE-94) vulnerability. Its CVSS base score is 10.0 (Critical).

Operationally, exploitation aligns with the MITRE ATT&CK technique Poisoned Pipeline Execution (T1677); ranked at the 39.5th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

This vulnerability is AI-related — categorised as Machine Learning Libraries.

Threat & Defense at a Glance

What attackers do: exploitation maps to Poisoned Pipeline Execution (T1677).

Threat & Defense Details

Likely Mitigating ControlsAI

Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.

SC-34 Non-modifiable Executable Programs

addresses: CWE-94

Makes persistent code injection into loaded programs impossible when the executable image itself resides on hardware-protected read-only media.

SC-44 Detonation Chambers

addresses: CWE-94

Dynamically generated code can be produced and executed inside the isolated chamber, preventing host compromise from code-injection payloads.

SI-10 Information Input Validation

addresses: CWE-94

Validates inputs used in dynamic code generation to block injected directives.

SI-16 Memory Protection

addresses: CWE-94

Directly prevents execution of attacker-supplied code written into data memory regions.

MITRE ATT&CK Enterprise TechniquesAI

T1677 Poisoned Pipeline Execution Execution

Adversaries may manipulate continuous integration / continuous development (CI/CD) processes by injecting malicious code into the build process.

attack.mitre.org →

Why these techniques?

Vulnerability directly enables Poisoned Pipeline Execution via malicious PR injecting code into GitHub Actions Docker build workflow, allowing arbitrary execution and credential exfiltration.

Confidence: HIGH · MITRE ATT&CK Enterprise v18.1

NVD 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.

Deeper analysisAI

Automated synthesis unavailable for this CVE.