Security readout for executives and security teams
Plain-English summary
A malicious Nx Console release, version 18.95.0, briefly reached two extension marketplaces on 19 May 2026. Organizations whose developer systems installed or automatically received that exact version should treat those systems as potentially compromised. Version 18.100.0 is identified as uncompromised.
Executive priority
Treat this as an immediate developer-endpoint incident-response priority. Quickly identify installations of version 18.95.0, isolate potentially affected systems according to established procedures, and oversee remediation and vendor-indicator review. Evidence is insufficient to assume every Nx Console user was exposed.
Technical view
CVE-2026-48027 is a software supply-chain compromise classified as CWE-506. Only Nx Console 18.95.0 is identified as affected. Its CVSS 4.0 score is 9.3, with potentially high confidentiality, integrity, and availability impact. The supplied evidence does not describe the malicious code's detailed behavior.
Likely exposure
Exposure is most likely where Nx Console 18.95.0 was installed or automatically updated. It was available through Visual Studio Marketplace from 12:30–12:48 UTC and OpenVSX from 12:33–13:09 UTC on 19 May 2026. Marketplace removal does not remove already-installed copies.
Exploitation context
CISA lists CVE-2026-48027 in its Known Exploited Vulnerabilities catalog, supporting known exploitation. This incident involved an intentionally malicious published extension rather than merely proof-of-concept availability. The supplied bundle does not establish victim count, attacker identity, persistence methods, or the malicious code's precise actions.
Researcher notes
The affected scope is explicitly limited to version 18.95.0. CVSS 4.0 is 9.3 with AV:N/AC:L/AT:N/PR:N/UI:N and high vulnerable-system impacts. Version 18.100.0 is stated to be uncompromised. Consult the vendor postmortem for indicators; none are reproduced in the supplied bundle.
Mitigation direction
- Remove or disable every installed copy of Nx Console 18.95.0.
- Upgrade Nx Console to the identified uncompromised version, 18.100.0.
- Follow the vendor advisory and postmortem guidance for potentially affected systems.
- Apply applicable CISA KEV remediation requirements within organizational timelines.
Validation and detection
- Inventory developer endpoints and environments for Nx Console version 18.95.0.
- Review extension installation and update records around the stated marketplace exposure windows.
- Compare potentially affected systems with the vendor's published indicators of compromise.
- Verify remediated endpoints run version 18.100.0 and no longer contain 18.95.0.
Public sources used
The source record changed after analysis: Material source record changed after analysis.
Conservative CVE-to-ATT&CK context
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ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-506: Exact CWE lookup
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Open ATT&CK lookupCVE-2026-48027 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Critical
- CVSS
- 9.3 (4.0)
- Known Exploited
- Yes
- Published
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CISA KEV status
SSVC decision data
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N——GitHub_MVulnerability scoring details
Base CVSS 4.0 score
9.3CriticalVector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- Added to KEVCISA-ADP
CISA Known Exploited Vulnerabilities metadata lists this CVE as known exploited.
- ADP timelineCISA-ADP
CVE-2026-48027 added to CISA KEV
- CVE publishedCVE Program
The CVE record was published.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
- 2026-05-27T00:00:00.000Z: CVE-2026-48027 added to CISA KEV
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/nrwl/nx-console/security/advisories/GHSA-c9j4-9m59-847wCVE reference, GitHub_M · x_refsource_CONFIRM
- https://github.com/nrwl/nx-console/issues/3139CVE reference, GitHub_M · x_refsource_MISC
- https://nx.dev/blog/nx-console-v18-95-0-postmortem#indicators-of-compromiseCVE reference, GitHub_M · x_refsource_MISC
- https://www.stepsecurity.io/blog/nx-console-vs-code-extension-compromisedCVE reference, GitHub_M · x_refsource_MISC
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-48027CVE reference, CISA-ADP · government-resource
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Embedded Malicious Code
Embedded Malicious Code represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.