Malicious code in checkout-use-notifications (npm)
The npm package 'checkout-use-notifications' version 35.6.1 contains malicious code that, upon requiring the package, loads a script which fetches a platform-specific binary payload from obfuscated Cloudflare Workers hosts. The payload is delivered using a DNS TXT-record fallback channel and is saved to temporary directories under disguised filenames before execution. This behavior is characteristic of a malicious dropper designed to evade detection and persist on the system.
AI Analysis
Technical Summary
The 'checkout-use-notifications' npm package version 35.6.1 includes code in its index.js that unconditionally loads a shim script. This shim fetches a platform-specific binary payload from obfuscated Cloudflare Workers domains, with a DNS TXT-record fallback mechanism that reconstructs the payload from base64-encoded chunks if HTTPS fetches fail. The payload is saved to temporary directories with disguised filenames, permissions are set to executable, and it is spawned detached from the parent process. The use of runtime-assembled hostnames, disguised on-disk filenames, and a DNS covert channel are canonical indicators of malicious dropper activity.
Potential Impact
Systems that install and execute the affected version of this package risk running a malicious binary that is fetched and executed without user consent. This can lead to unauthorized code execution, potential system compromise, and persistence of malicious code. The obfuscation and fallback mechanisms increase the likelihood of successful payload delivery even in restricted network environments.
Mitigation Recommendations
No official patch or remediation is currently documented. Users should avoid using version 35.6.1 of the 'checkout-use-notifications' package. It is recommended to remove this package from projects and replace it with a trusted alternative. Monitor vendor advisories for updates or official fixes. Since this is not a cloud service, remediation depends on user action.
Malicious code in checkout-use-notifications (npm)
Description
The npm package 'checkout-use-notifications' version 35.6.1 contains malicious code that, upon requiring the package, loads a script which fetches a platform-specific binary payload from obfuscated Cloudflare Workers hosts. The payload is delivered using a DNS TXT-record fallback channel and is saved to temporary directories under disguised filenames before execution. This behavior is characteristic of a malicious dropper designed to evade detection and persist on the system.
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 'checkout-use-notifications' npm package version 35.6.1 includes code in its index.js that unconditionally loads a shim script. This shim fetches a platform-specific binary payload from obfuscated Cloudflare Workers domains, with a DNS TXT-record fallback mechanism that reconstructs the payload from base64-encoded chunks if HTTPS fetches fail. The payload is saved to temporary directories with disguised filenames, permissions are set to executable, and it is spawned detached from the parent process. The use of runtime-assembled hostnames, disguised on-disk filenames, and a DNS covert channel are canonical indicators of malicious dropper activity.
Potential Impact
Systems that install and execute the affected version of this package risk running a malicious binary that is fetched and executed without user consent. This can lead to unauthorized code execution, potential system compromise, and persistence of malicious code. The obfuscation and fallback mechanisms increase the likelihood of successful payload delivery even in restricted network environments.
Mitigation Recommendations
No official patch or remediation is currently documented. Users should avoid using version 35.6.1 of the 'checkout-use-notifications' package. It is recommended to remove this package from projects and replace it with a trusted alternative. Monitor vendor advisories for updates or official fixes. Since this is not a cloud service, remediation depends on user action.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- MAL-2026-12602
- Osv Schema Version
- 1.7.4
- Aliases
- []
- Ecosystems
- ["npm"]
- Database Specific Severity
- null
- Cvss Version
- null
Threat ID: 6a735733bf8831d53913d156
Added to database: 08/05/2026, 15:30:59 UTC
Last enriched: 08/05/2026, 16:06:52 UTC
Last updated: 08/05/2026, 16:06:52 UTC
Views: 2
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.