Malicious code in express-guardrail (npm)
--- _-= Per source details. Do not edit below this line.=-_ ## Source: ghsa-malware (40e91ddac990897c8c43891c5abf64696a0e9d9d4b168e7a6e5f4a827e4f040d) Any computer that has this package installed or running should be considered fully compromised. All secrets and keys stored on that computer should be rotated immediately from a different computer. The package should be removed, but as full control of the computer may have been given to an outside entity, there is no guarantee that removing the package will remove all malicious software resulting from installing it.
AI Analysis
Technical Summary
The express-guardrail package versions 1.3.5 and 1.4.1 distributed via npm contain malicious code that compromises the host system. Installation or execution of these versions can lead to full system compromise, allowing attackers to potentially control the affected computer. Due to the nature of the compromise, simply uninstalling the package does not guarantee removal of all malicious artifacts. This threat is identified as MAL-2026-6821 and is tracked under GHSA-62qq-cf7w-23hx. No CVSS score or known exploits in the wild have been reported yet.
Potential Impact
Systems with express-guardrail versions 1.3.5 or 1.4.1 installed are fully compromised, risking exposure of all stored secrets and keys. Attackers may have persistent access and control over the affected system, potentially leading to data theft, further malware installation, or lateral movement within networks.
Mitigation Recommendations
Remove the express-guardrail package versions 1.3.5 and 1.4.1 immediately. Rotate all secrets, keys, and credentials stored on the affected system from a separate, uncompromised device. Because full system compromise is possible, consider rebuilding or thoroughly cleaning the system to ensure removal of all malicious components. Monitor for any suspicious activity related to this compromise.
Malicious code in express-guardrail (npm)
Description
--- _-= Per source details. Do not edit below this line.=-_ ## Source: ghsa-malware (40e91ddac990897c8c43891c5abf64696a0e9d9d4b168e7a6e5f4a827e4f040d) Any computer that has this package installed or running should be considered fully compromised. All secrets and keys stored on that computer should be rotated immediately from a different computer. The package should be removed, but as full control of the computer may have been given to an outside entity, there is no guarantee that removing the package will remove all malicious software resulting from installing it.
Affected software
Run on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The express-guardrail package versions 1.3.5 and 1.4.1 distributed via npm contain malicious code that compromises the host system. Installation or execution of these versions can lead to full system compromise, allowing attackers to potentially control the affected computer. Due to the nature of the compromise, simply uninstalling the package does not guarantee removal of all malicious artifacts. This threat is identified as MAL-2026-6821 and is tracked under GHSA-62qq-cf7w-23hx. No CVSS score or known exploits in the wild have been reported yet.
Potential Impact
Systems with express-guardrail versions 1.3.5 or 1.4.1 installed are fully compromised, risking exposure of all stored secrets and keys. Attackers may have persistent access and control over the affected system, potentially leading to data theft, further malware installation, or lateral movement within networks.
Mitigation Recommendations
Remove the express-guardrail package versions 1.3.5 and 1.4.1 immediately. Rotate all secrets, keys, and credentials stored on the affected system from a separate, uncompromised device. Because full system compromise is possible, consider rebuilding or thoroughly cleaning the system to ensure removal of all malicious components. Monitor for any suspicious activity related to this compromise.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- MAL-2026-6821
- Osv Schema Version
- 1.7.4
- Aliases
- ["GHSA-62qq-cf7w-23hx"]
- Ecosystems
- ["npm"]
- Database Specific Severity
- null
- Cvss Version
- null
Threat ID: 6a4c343c27e9c797195faeb1
Added to database: 07/06/2026, 23:03:24 UTC
Last enriched: 07/06/2026, 23:26:48 UTC
Last updated: 07/28/2026, 10:22:18 UTC
Views: 34
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
External Links
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.