CVE-2026-48027
Published: 27 May 2026
Summary
CVE-2026-48027 is a critical-severity Embedded Malicious Code (CWE-506) vulnerability in Nx Nx Console. Its CVSS base score is 9.3 (Critical).
Operationally, exploitation aligns with the MITRE ATT&CK technique Compromise Software Supply Chain (T1195.002); ranked in the top 23.5% of CVEs by exploit likelihood; CISA has added it to the Known Exploited Vulnerabilities catalog; a public proof-of-concept is referenced.
The strongest mitigations our analysis identified are NIST 800-53 CM-14 (Signed Components) and SI-7 (Software, Firmware, and Information Integrity).
Deeper analysis
Nx Console, the user interface for Nx and Lerna, is affected by CVE-2026-48027, a supply-chain compromise (CWE-506) in which a malicious version 18.95.0 was published to the Visual Studio Marketplace and OpenVSX. The tainted package carried a CVSS 4.0 score of 9.3 and remained available for roughly 18 minutes on the Marketplace and 36 minutes on OpenVSX before removal.
An unauthenticated attacker who successfully published the malicious extension could deliver embedded malicious code to any user installing or updating Nx Console during the exposure window, resulting in high impact to confidentiality, integrity, and availability on affected developer workstations.
Advisories published by the Nx project and referenced in the GitHub security advisory GHSA-c9j4-9m59-847w direct users to upgrade immediately to the clean release 18.100.0; the postmortem at nx.dev and the StepSecurity analysis provide indicators of compromise, while the entry appears in the CISA Known Exploited Vulnerabilities catalog.
The associated EPSS score is 0.3206 at both current and peak values.
OWASP Top 10 for Web (2025)
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2026-32550
Vulnerability details
Nx Console is the user interface for Nx & Lerna. On 19 May 2026, a malicious version of Nx Console, 18.95.0, was published at 12:30 PM UTC and removed soon after at 12:48 PM UTC, leaving it available for ~18…
more
minutes in Visual Studio Marketplace. For OpenVSX, the problem was detected later, and the compromised version was available from 12:33 UTC to 13:09 UTC (~36 minutes). Version 18.100.0 of Nx Console is not compromised and users may remediate by upgrading to that version.
- CWE(s)
- KEV Date Added
- 27 May 2026
Related Threats
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Malicious version of Nx Console extension published to VS Marketplace/OpenVSX directly enables compromise of software supply chain (CWE-506).
CVEs Like This One
Affected Assets
Mitigating Controls
Mitigating Controls (NIST 800-53 r5) AI
Requires verification of software, firmware, and information integrity (e.g., via signatures or hashes) before installation, directly blocking the malicious Nx Console 18.95.0 package from the Marketplace/OpenVSX exposure window.
Mandates use of signed components and verification of digital signatures, preventing installation of the unsigned or improperly signed malicious extension version 18.95.0.
Requires implementation of supply-chain risk controls and processes for acquired software, addressing the CWE-506 compromise that allowed the tainted Nx Console release to reach users.