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CVE-2026-48027

From Exploited flaws, HARD’s guide to the flaws being used in attacks · Checked
This article is about a flaw in Nx Console. For every flaw being used in attacks, see Exploited flaws.

CVE-2026-48027 is a security flaw in Nx Console. A tampered release of Nx Console was published with malicious code built in. The US Cybersecurity and Infrastructure Security Agency (CISA) added it to its catalog of flaws known to be used in attacks on 27 May 2026, and says ransomware gangs have used it.[1]

Nx Console is business software or equipment. Most families won’t have it, but attackers break into it to get inside companies, and from there to what those companies hold about their customers, patients and staff. Nx has published a fix or advice.

Description

CISA calls it a console embedded malicious code in Nx Nx Console. In its words: “Nx Console contains an embedded malicious code vulnerability that allowed a malicious version of Nx Console to be published. The compromised extension fetched an obfuscated payload that could harvested credentials from multiple sources on disk and in memory.”[1]

The CVE record adds: “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 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.”[2]

The underlying weakness is CWE-506, in MITRE’s list of common software weaknesses.

It scores 9.8 out of 10 on the Common Vulnerability Scoring System, which rates it critical, scored by NVD using CVSS 3.1.[2]

Affected versions

NVD’s record doesn’t list version ranges for it; Nx’s advisory has them[3]. CISA names the product as Nx Nx Console.

Most families won’t have Nx Console; it’s for whoever looks after IT at work.

Exploitation

CISA added it to its catalog of known exploited vulnerabilities on 27 May 2026, within a day of it being made public. CISA lists a flaw only when it has reliable evidence of it being exploited, and gave US federal agencies until 10 Jun 2026 to fix it.[1] CISA says ransomware gangs have used it.

FIRST’s Exploit Prediction Scoring System, which estimates how likely a flaw is to be used in attacks in the next 30 days from what it sees across the internet, puts it at 2%. That’s in the top 21% of the flaws it scores.[4]

CISA assesses it as automatable: attackers can run it against many targets at once.

CISA doesn’t say who was attacked, or how.

Fix

Nx has published a fix or advice.[3] CISA’s required action: “Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.”[1]

  1. Check whether you use it.Nx Console is business software or equipment, so most families won’t have it. If you run a business, or work from home on company equipment, ask whoever looks after your IT.
  2. Send this page to your IT person.Ask them to confirm it’s fixed, or not in use. CISA gave US government agencies until 10 Jun 2026 to fix it.
  3. If it can’t be fixed, take it offline.CISA’s advice when there’s no fix is to stop using the product, or take it off the internet, until there is one.

You can’t fix someone else’s server, but you can watch for what follows a break-in like this: a breach notice, a password reset you didn’t ask for, or a scam message that knows things it shouldn’t. HARD watches for those for you and your family.

Timeline

DateEvent
The flaw is made public in the National Vulnerability Database, with a severity score of 9.8.[2]
CISA adds it to its catalog of flaws known to be used in attacks, noting that ransomware gangs have used it.[1]
CISA’s deadline for US government agencies to fix it.[1]
FIRST puts the odds of it being used in attacks in the next 30 days at 2%.[4]

See also

Similar flaws

  • CVE-2026-8398, Daemon Tools Lite: tools lite embedded malicious code ·
  • CVE-2026-45321, TanStack: unspecified ·
  • CVE-2026-33634, Aquasecurity Trivy: embedded malicious code ·
  • CVE-2025-54313, Prettier eslint-config-prettier: embedded malicious code ·
  • CVE-2025-59374, ASUS Live Update: embedded malicious code ·

Added the same day

  • CVE-2026-8398, Daemon Tools Lite: tools lite embedded malicious code ·
  • CVE-2026-45321, TanStack: unspecified ·

References

  1. ^ Cybersecurity and Infrastructure Security Agency. “Nx Console Embedded Malicious Code Vulnerability”. Known Exploited Vulnerabilities Catalog, added 27 May 2026.
  2. ^ National Institute of Standards and Technology. “CVE-2026-48027 Detail”. National Vulnerability Database, published 27 May 2026.
  3. ^ Nx. Advisories and fixes: github.com, nx.dev.
  4. ^ FIRST. “Exploit Prediction Scoring System”. EPSS 0.018, percentile 79.1, 31 Oct 2026.
  5. CVE Program. “CVE-2026-48027”. The official CVE record.

This article is built from CISA’s catalog (version 2026.10.30), NVD’s record and FIRST’s scores, kept in HARD’s database and checked every morning. The plain English is HARD’s.